Which symbol represents a light dependent resistor in circuit diagrams?

Which symbol represents a light dependent resistor in circuit diagrams?

• A. Lamp symbol
• B. LDR symbol
• C. Ohmmeter symbol
• D. LED symbol

Answer: (B)

A light dependent resistor is shown as a resistor symbol with arrows pointing toward it, indicating that light affects its resistance. The arrows depict incoming light that changes how the component behaves. This distinguishes it from other symbols: a lamp is a light source, an LED is a light-emitting diode, and an ohmmeter is a measuring tool. The LDR’s resistance decreases as light intensity increases (and rises in darkness), which is why the light arrows are a key part of its symbol.

A light dependent resistor is shown as a resistor symbol with arrows pointing toward it, indicating that light affects its resistance. The arrows depict incoming light that changes how the component behaves. This distinguishes it from other symbols: a lamp is a light source, an LED is a light-emitting diode, and an ohmmeter is a measuring tool. The LDR’s resistance decreases as light intensity increases (and rises in darkness), which is why the light arrows are a key part of its symbol.