In a photoelectric effect, electrons are emitted -

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Important Questions on Electrons and Photons

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IMPORTANT

Physics Crash Course MHT-CET>Chapter 22 - Electrons and Photons>Exercise 1>Q 63

In the photoelectric effect, electrons are emitted

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Physics Crash Course MHT-CET>Chapter 22 - Electrons and Photons>Exercise 1>Q 64

A photocell is illuminated by a small bright source placed

1 m

away. When the same source of light is placed

2 m

away, the number of electrons emitted by photo cathode are reduced by a factor of

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Physics Crash Course MHT-CET>Chapter 22 - Electrons and Photons>Exercise 1>Q 65

If the intensity of incident light is increased in photoelectric emission, then which of the following is true?

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Physics Crash Course MHT-CET>Chapter 22 - Electrons and Photons>Exercise 1>Q 66

In the photoelectric experiment, if we use a monochromatic light, the $I - V$ curve is as shown. If work function of the metal is $2 eV,$ estimate the power of light used. (Assume efficiency of photo emission is $10^{- 3} %,$ i.e. number of photoelectrons emitted are $10^{- 3} %$ of number of photons incident on metal.)