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  • A photo-cell connected in an electrical circuit is placed at a distance ‘d’ from a source of light. As a result current I flows in the circuit. What will be the current in the circuit when the distance is increased to ‘2d’ ?<br

A photo-cell connected in an electrical circuit is placed at a distance ‘d’ from a source of light. As a result current I flows in the circuit. What will be the current in the circuit when the distance is increased to ‘2d’ ?
Option: 1 2I
Option: 2 \frac{I}{4}
Option: 3 \frac{I}{2}
Option: 4 I

Answers (1)

The number of electrons emitted per second is inversely proportional to distance square. So when the distance becomes 2d the current becomes I/4.

 

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Safeer PP

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