Measures current. Some types have a pointer on the dial, most have a digital display.

Measures current. Some types have a pointer on the dial, most have a digital display.

• A. Voltmeter
• B. Ammeter
• C. Ohmmeter
• D. Multimeter

Answer: (B)

Measuring current requires an instrument built to sense the flow of electrical charge through a conductor. An ammeter is designed for this purpose and is placed in series with the circuit so all the current passes through it. Analog versions use a pointer on a dial, while most modern ones show the value on a digital display. The other instruments focus on different quantities: a voltmeter reads voltage and is connected in parallel across a component; an ohmmeter measures resistance by applying a small current and reading the response; a multimeter can measure current, voltage, and resistance, but when you specifically need to measure current, the dedicated device is the ammeter.

Measuring current requires an instrument built to sense the flow of electrical charge through a conductor. An ammeter is designed for this purpose and is placed in series with the circuit so all the current passes through it. Analog versions use a pointer on a dial, while most modern ones show the value on a digital display. The other instruments focus on different quantities: a voltmeter reads voltage and is connected in parallel across a component; an ohmmeter measures resistance by applying a small current and reading the response; a multimeter can measure current, voltage, and resistance, but when you specifically need to measure current, the dedicated device is the ammeter.