Physics - Semiconductors Question with Solution | TestHub

PhysicsSemiconductorsPN junctionMedium2 minPYQ_2007

PhysicsMediumsingle choice

A photoelectric cell is illuminated by a point source of light $1 m$ away. When the source is shifted to $2 m$ then

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Answer:

Solution:

Key Idea Number of photoelectrons emitted per second is directly proportional to intensity of light. Intensity of light source is $I \propto \frac{1}{d ^{2}}$ When distance is doubled, intensity becomes one-fourth. As number of photoelectrons $\propto$ intensity, so number of photoelectrons is quarter of the initial number.

Stream:MHT_CETSubject:PhysicsTopic:SemiconductorsSubtopic:PN junction

⏱ 2mℹ️ Source: PYQ_2007

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