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(I) Cadmium show photoelectric emission ...

(I) Cadmium show photoelectric emission for ultraviolet light.
(II) Photosensitive materials eject photo electrons
(III) The photocurrent becomes zero at a particular negative potential
(IV) The liberation of electrons fromany surface of a substance is electron emission

A

I,II,III and IV

B

I and II only

C

I and III only

D

I, II and III only

Text Solution

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The correct Answer is:
A
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