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Q.

If in a photoelectric experiment, the wavelength of incident radiation is reduced from 6000 $\overset{o}{A}$ to 4000 $\overset{o}{A}$ then

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a

Stopping potential will decrease

b

The value of work function will decrease

c

Kinetic energy of emitted electrons will decrease

d

Stopping potential will increase

answer is B.

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Detailed Solution

stopping potential

$\begin{array}{l} V_{o} = \frac{hc}{e} [\frac{1}{λ} - \frac{1}{λ_{o}}] . \\ As λ decreases so V_{o} increases . \end{array}$

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