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    Question

    In a photocell light energy is converted into –

    A Potential energy Correct Answer Incorrect Answer
    B Chemical energy Correct Answer Incorrect Answer
    C Heat energy Correct Answer Incorrect Answer
    D Electrical energy Correct Answer Incorrect Answer

    Solution

    Photocells are scientifically known as photo-resistors. A photo-resistor or light dependent resistor (LDR) is a resistor whose resistance decreases with increasing incident light intensity; in other words, it exhibits photoconductivity. A photo-resistor is made of a high resistance semiconductor. If light falling on the device is of high enough frequency, photons absorbed by the semiconductor give bound electrons enough energy to jump into the conduction band.

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