Question

Anna sets up the circuit shown using a resistor, an LDR and a battery. She finds that when she shines a torch on the LDR the voltage across the resistor increases. Explain why the voltage increases.​

Answer 1

The voltage across the resistor increases because extra electron gained by the LDR when the light is shone on it.

Increase in the voltage

Increase in the voltage can occur due to some of the following reasons.

From Ohm's law voltage is directly proportional to current flowing in a circuit.

V ∝ I

The voltage across the resistor increases because extra electron gained by the LDR when the light is shone on it.

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