Electrical Comprehension DAA Practice Test

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• What is made up of two or more cells connected together?
• Which component is a two-terminal resistor used to control current and can adjust lamp brightness or speed?
• Which device converts electrical energy into heat?
• Which statement best describes the relationship between branch currents and total current?
• What happens when a fuse is subjected to a current above its rating?
• In a series circuit, the voltages across the components add up to the battery voltage?
• What unit is used for capacitance?
• What term describes the rate at which electric charge flows?
• Which component transfers energy through magnetic fields to change AC voltages?
• What power is produced when a device has 1 volt across it and draws 1 amp of current?
• An electrical component that stores charge, with unit of Farads, consisting of two plates separated by an insulating material
• What happens to brightness when an extra lamp is added in series?
• To measure the potential difference across a cell, where are the voltmeter leads placed?
• In parallel circuits, for two lamps with different resistances, which lamp has higher current?
• In a cell symbol, which terminal is positive?
• In a series circuit with resistors 50 Ω and 100 Ω, the voltages across the resistors are in what ratio?
• If you double the voltage across a fixed resistor, what happens to the current?
• Which formula expresses the relationship between capacitance, charge and voltage?
• LED is described as what?
• In a series circuit, the sum of the potential differences across all components equals the battery's total potential difference?
• A subatomic particle that carries a negative electric charge is called what?
• If a conductor's cross-sectional area decreases, what happens to its resistance?
• In static discharge safety during refueling, why are aircraft and fueling equipment earthed?
• In a parallel circuit, if one branch breaks, current continues in the remaining branches?
• When a capacitor is fully charged, there is what?
• What is the unit of potential difference?
• Which example illustrates a series circuit?
• In a parallel circuit, what quantity is the same across each branch and equal to the source voltage?
• Direct current is described as current that flows in which direction?
• Which component provides the energy for electrical devices to function?
• Which safety device melts to interrupt excessive current?
• What term describes a material that acts as a very poor conductor of electricity?
• If electrons transfer 9 joules of energy per coulomb of charge, what is the potential difference?
• Which unit measures electric potential difference?
• Which expression is given for the total charge transferred?
• Which statement correctly describes the charges of protons and electrons?
• Which statement correctly explains why longer wires have higher resistance?
• If current flows in one direction, which type of current is this?
• Which component blocks direct current and passes alternating current?
• Connected in series, meaning it is connected in a loop with all the other components.
• What is the same in all parts of a series circuit?
• If the voltage is constant and the current doubles, what happens to resistance?
• The changes in direction of current describe which type of current?
• Which statement is true about the relationship between the source current and the branch currents in a parallel circuit?
• Which device is commonly shown as a variable resistor to adjust brightness or speed?
• A transducer that converts temperature into resistance is called a what?
• Which component stores the electrical charge of a circuit and can be used for timing with a resistor?
• Which statement about voltage in parallel circuits is true?
• Which symbol represents a fuse in electrical diagrams?
• What is the SI unit of capacitance?
• What is the voltage and frequency of the typical UK mains supply?
• Which statement correctly describes alternating current (AC)?
• In electrical terms, what is a lamp?
• A thermistor is a sensor device; it converts temperature changes into changes in what electrical property?
• What shows how electrical components are connected in a circuit?
• If a second lamp is added in parallel, what happens to the voltage across each lamp?
• What is potential difference commonly called?
• Replacing a conductor with an insulator in a series circuit would likely result in what change to the current?
• At a low temperature, the resistance of a thermistor is?
• Which type of material would most easily allow current to flow?
• What device measures resistance?
• In circuit diagrams, which symbol denotes an ammeter?
• In circuit diagrams, which symbol denotes an inductor?
• What is the circuit symbol for a battery?
• Which instrument measures current and must be connected in series?
• Which device temporarily breaks the circuit when opened?
• Which of the following statements increases capacitance when the plate area is larger?
• What is the main purpose of insulating material on electrical wires?
• In a car, the lamp on the dashboard is typically used to indicate what?
• What is another name for a light dependent resistor?
• An _____ in a wire is a flow of electrons.
• The component that supplies electrical charge in a circuit, and when multiple cells are used, the group is called a battery?
• Which diagram shows how the components are connected in a circuit?
• What is the voltage across each branch in a parallel circuit?
• What is the rate of flow of electric charge called?
• What is the current when one coulomb flows past a point in one second?
• Which term describes any material that can carry an electrical current, and may also conduct heat?
• In a simple circuit, which component serves as the basic unit of energy storage that can be combined to form a battery?
• Which symbol is used to denote a thermistor in circuit diagrams?
• Which circuit has multiple paths for current to flow?
• The voltage loss across part of a circuit due to impedance is called
• Which term describes a collection of two or more cells used to provide electrical energy?
• Which device uses magnetic fields to transfer energy and adjust AC voltages?
• Which description best fits alternating current?
• What is the unit of charge?
• Which supply contains more than one cell and provides the electrical charge of a circuit?
• What happens to the temperature of a resistor when an electrical current flows through it?
• What is made by joining two or more cell symbols?
• If a circuit has no branches, what type is it?
• Which statement correctly describes LDRs with increasing light?
• If you read the potential difference across a component, what quantity are you measuring?
• In a series circuit, what is shared between components?
• In a three-pin plug, the earth pin is typically connected to which conductor color?
• Adding more lamps in series will have what effect on total resistance?
• The ratio of voltage to current in an alternating current circuit is called
• What can be added to a parallel circuit to turn components on and off?
• When more branches are added in parallel, what happens to total current drawn from the source?
• Why does an oil tanker connect a metal wire to the ground when transferring fuel?
• Which term describes electronics that use continuous signals rather than discrete steps?
• Which term is the voltage generated by a battery or a magnetic field?
• Which term describes a basic schematic showing how components are connected?
• When two lamps are added in series, what happens to the total resistance?
• If you add another branch in parallel, how does the total current drawn from the cell typically change?
• Which statement correctly describes current using Ohm's law when voltage and resistance are known?
• Which component is a single energy source in a circuit and can be combined with others to form a battery?
• In a circuit where lamps are connected in series, why do they become dimmer when more are added?
• When two parallel branches reconnect at a node after flowing through the branches, the currents combine to form what?
• Which metal is the best conductor among Silver, Copper, and Aluminium?
• ____ stops flowing in the circuit because there is no longer a complete loop?
• In a series circuit, what happens to total resistance if you add more components?
• Which of the following is not an effect of an electrical current?
• Which quantity remains constant through all components in a series circuit?
• In a parallel circuit, what happens to the current at a junction where branches split?
• A potential difference of one volt indicates energy transfer of how much per coulomb?
• Why might an ammeter show a lower reading than before when components are added in series, given current remains the same?
• What is the charge of a neutron?
• Which statement about grounding a tanker during fueling is true?
• Which symbol represents a crystal oscillator?
• A 1 farad capacitor charged with 1 coulomb has potential difference of how many volts?
• Which symbol represents an ohmmeter in circuit diagrams?
• What happens to the resistance of a light dependent resistor as the light level increases?
• What type of current is produced when electricity flows in a single direction, such as from batteries?
• In a series circuit, the ammeter is connected in what location?
• Which law relates magnetic fields to the currents that produce them?
• When current reaches a junction in a parallel circuit, how does it move?
• In a parallel circuit, what is different across all branches?
• What quantity is measured by a voltmeter?
• Which term describes a single energy source such as a battery, solar panel, or power supply?
• Which symbol is used to denote a wattmeter on a schematic?
• At a high temperature, the resistance of a thermistor is?
• Why does a thin wire have higher resistance than a thick wire?
• An output device that includes a coil of wire that creates a magnetic field when current passes through, often used to convert electrical energy into mechanical energy by pulling on something, is called what?
• Which electrical component only permits current to flow in one direction?
• How is a voltmeter connected in a circuit, unlike an ammeter?
• What electrical property measures opposition to current in a circuit?
• In circuit diagrams, which symbol denotes a lamp?
• In circuits, which component is commonly used to limit current in an LED circuit?
• What is the unit of resistance?
• In a simple DC circuit, which component is most likely to open-circuit when current exceeds its rating?
• What increases when components are added in series?
• Which component acts as a temperature sensor?
• Which statement correctly describes a battery?
• Which material has low resistance?
• When additional parallel branches are added, what happens to the total current drawn from the cell?
• Which instrument measures current?
• The mathematical quantity used to define the effective magnitude of alternating current voltage or current is
• When refuelling an aeroplane, to avoid sparks from static electricity, what is done?
• If the charge on a capacitor doubles while the voltage remains constant, what happens to capacitance?
• What is the total current flowing from the power source in a parallel circuit?
• Which statement describes how you measure the potential difference of a cell or battery?
• Which device measures current?
• A current in a conducting material which results from induction by moving or varying the magnetic field, causing energy loss in iron cores, is called what?
• What does a transformer do to electrical currents?
• What is the formula for capacitance?
• In parallel, what is shared between components?
• The three components Ohm's law focuses on are
• Which symbol represents a wattmeter in circuit diagrams?
• In a series circuit with 50 Ω and 100 Ω resistors, voltages are in ratio 1:2; The voltage across 50 Ω is one third of the total supply?
• What has a high resistance (a material)?
• As light level increases, what happens to the current through an LDR in a simple circuit?
• What is the equation for charge in terms of current and time?
• What is the unit used to measure electric current?
• Which action describes why voltmeters are connected in parallel to measure voltage?
• If a branch has very high resistance compared to others, its current will be
• If you double the resistance of one branch in parallel, what happens to that branch's current?
• In a series circuit, identical resistors share PD equally?
• What does the volt measure?
• In a parallel circuit, if components have different resistances, what is different between branches?
• What is the property that reduces the flow of charge through a circuit called?
• Why is the resistance of a long wire greater than a short wire?
• Which component prevents current from flowing through a circuit when opened?
• What shape are most cells?
• In schematic diagrams, which symbol represents a protective device that melts when excessive current flows?
• As more components are added in series, what happens to total resistance?
• What has the same value in a series circuit, no matter where ammeter goes?
• In a series circuit, if the material connected is a conductor, what happens to the lights?
• Current flows within electromagnetism. Which law illustrates how magnetic fields are powered by electrical currents?
• In bright light, what happens to the resistance of an LDR?
• An ammeter reading in series may change as more components are added. Why?
• In a parallel circuit, the current through a branch is determined primarily by which property of that branch?
• Which symbol represents an inductor?
• Which symbol represents a resistor in circuit diagrams?
• Which symbol represents a transformer in circuit diagrams?
• Which statement best describes conductors and insulators?
• If one component in parallel circuit breaks, others still work?
• If a component is disconnected in a series circuit, what happens to the current?
• The number of protons in an atom is called what?
• Which shape is typical for most energy cells?
• Measures the opposition of a circuit which permits a current when voltages are applied.
• Which statement expresses Ohm's law?
• At a junction where two parallel branches meet, what happens to the currents from each branch?
• Why is an ammeter placed in series in a circuit?
• Increasing the plate area or decreasing the distance between plates results in
• Which of the following statements about LDRs is true?
• Which term describes a material that can carry an electric current and may also conduct heat?
• Thermistors are commonly used as what type of sensor?
• Which symbol denotes a heater?
• Which component stores energy in a magnetic field using a coil of wire?
• The relationship between electric fields and magnets is described as what?
• Which instrument is used to measure current in a circuit?
• How can you measure the potential difference across a component?
• What do ammeters measure?
• What is the formula for resistance?
• What is the standard form of Ohm's law?
• In parallel, each component experiences what relative to the cell?
• The ratio of voltage to current in an alternating current circuit
• The component that stores energy in a magnetic field when current flows through a coil is
• What is defined as the energy transferred per unit charge between two points in a circuit?
• The ampere is defined as the flow of how much charge per second?
• Which is an example of a parallel circuit?
• The unit of capacitance is the farad. Which option correctly names the unit?
• Which component is used to control whether the circuit is complete by opening or closing the path?
• True or false: A voltmeter is connected in parallel to measure voltage across a component.
• A battery is formed by combining several of these small energy sources. What are they?
• What happens to the total resistance of a circuit when multiple components are connected in parallel?
• What stays bright if you add more lamps in parallel?
• What do voltmeters measure?
• The inherent resistance present in all electrical materials is called
• What is the term for a temperature-dependent resistor used as a sensor in circuits?
• If the total number of electrons equals the total number of protons, what is the overall charge of the atom?
• Which symbol is used to denote a bipolar transistor on a schematic?
• In a parallel circuit, if one branch has greater resistance than another, what happens to the current in that branch?
• Which component is used to detect light levels, eg in automatic security lights?
• What device is a transducer that converts energy into sound?
• Which instrument is used to measure potential difference?
• If a lamp breaks or a component is disconnected in series, what happens?
• In a parallel circuit, adding more branches generally causes the total current to
• Which term describes the flow of electric charge in a circuit?
• What is the SI unit of electric charge?
• Which device is used to increase or decrease AC voltages by coupling two coils around an iron core?
• Which symbol represents a bipolar transistor?
• Which circuit has no branches?
• Where can the ammeter be placed in a series circuit?
• Which component stores energy and is commonly used in timing circuits with resistors?
• Also known as the potential difference or electromotive force, what term describes this quantity?
• What is the most likely reason a bulb does not light?
• What term describes a device that provides electrical energy and can consist of multiple cells?
• A fuse that contains a metal strip that melts instantly on a short circuit is known as what?
• What are the units of current?
• Systems with a continuous variable signal are known as what?
• Place in order from best to worst conductor: Silver, Aluminium, Copper
• What happens to the resistance of a thermistor as the temperature increases?
• Which term describes a material that can carry an electric current?
• Ammeters measure current in which unit?
• How is the potential difference distributed among components in a series circuit?
• A circuit for measuring an unknown resistance using a quadrilateral with three known resistors is called
• Which device is used to detect light levels in automatic lighting systems in many circuits?
• In a parallel circuit, the potential difference is the same across all branches?
• In a series circuit, if the material connected is an insulator, what happens to the lights?
• Which arrangement describes the correct method to measure the potential difference across a single resistor?
• Which device allows current to flow by closing the circuit?
• The difference in energy between two parts of a circuit is called what?
• What is the safety device that melts when the current exceeds a specified value?
• What is the equation linking power and cost?
• In a series circuit, which quantity remains the same across every component?
• If one lamp in a parallel circuit burns out, what happens to the other lamps?
• Which symbol is commonly used to denote the ammeter in circuit diagrams?
• In a series circuit with two identical resistors, how is the PD distributed across them?
• Which component changes resistance with light levels?
• In a 50 Hz mains supply, how often does the current change direction per second?
• Named because they resemble the 'eddies' in a stream. Currents flow in loops within a conductor, strongest at the surface
• Which expression gives energy transferred by an electric circuit?
• If the resistance in a circuit is constant, what happens to the current when the voltage increases?
• Measures current. Some types have a pointer on the dial, most have a digital display.
• Which property makes thermistors suitable for temperature sensing?
• Which subatomic particle orbits the nucleus and carries a negative electric charge?
• Which expression represents the power in terms of voltage and current?
• If a circuit has branches, it is classified as which type?
• Current in the different branches of a parallel circuit is described as
• Which wire color in a plug acts as a safety earth conductor?
• The flow of current in a circuit can ______ when a component is not working, as less resistance for current to flow through.
• In a parallel circuit, how does the total current relate to the branch currents?
• What term describes current that changes direction?
• Which statement correctly represents Ohm's Law relating voltage, current, and resistance?
• Which symbol is used to denote a crystal oscillator on a schematic?
• What provides the potential difference needed to move charges in a circuit?
• The larger the area of plates or the smaller the distance between each plate, the what happens to the capacitance?
• In a parallel circuit, the current in a branch is determined primarily by which property of that branch?
• Which term describes a single energy source such as a battery, solar panel, or power supply?
• The voltage generated by a battery or a magnetic field is called
• Which statement best describes how current behaves in a parallel circuit when branches are present?
• In a series circuit, if you add more resistors, the current decreases?
• ____ can be added to a series circuit to turn components on and off.
• Adding components in series increases total resistance, meaning less current flows.
• What electrical instrument measures voltage, also known as potential difference?
• Which instrument is used to measure potential difference across a component?
• Which symbol would you look for to identify a transformer in a schematic?
• The energy transfer equation E = I x V x T uses which quantities?
• What happens to the resistance of LDRs as light intensity rises?
• What term describes a basic schematic showing how components are connected?
• In a parallel circuit, total resistance changes when more components are added?
• In circuit diagrams, which symbol denotes a light emitting diode?
• In a series circuit, what is the relationship of current through each component?
• Which instrument measures the potential difference across components?
• In circuit diagrams, which symbol indicates an open switch?
• With a constant supply voltage, what happens to current when more components are added in series?
• Which symbol represents a light dependent resistor in circuit diagrams?
• If resistance increases while voltage remains constant, what happens to the current?
• In a series circuit, what quantity is shared between components?
• What is the equation for charge in terms of current and time?