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Standard XII

Physics

Dependence of Resistance on Temperature

The maximum e...

Question

The maximum energy of photo electrons emitted in a photocell is 2 eV. For no photo-electrons to reach the anode, the stopping potential should be:

2 V

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4 V

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Solution

The correct option is A 2 V
$S t o p p i n g p o t e n t i a l = \frac{K . E . m a x}{e}$
= $\frac{2 e V}{e}$
$= 2 V$ .

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The maximum energy of photo electrons emitted in a photocell is 2 eV. For no photo-electrons to reach the anode, the stopping potential should be:

The correct option is A 2 VStopping potential=K.E.maxe=2eVe=2 V.

The correct option is A 2 V
$S t o p p i n g p o t e n t i a l = \frac{K . E . m a x}{e}$
= $\frac{2 e V}{e}$
$= 2 V$ .