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A nagatively charge electroscope with zi...

A nagatively charge electroscope with zinc disc discharge when irradiated by an ultraviolet lamp. What caused this ?

A

`a` - particle from the source combine with electron of the disc

B

electron escape from the disc when ultraviolet radiation fall on it,

C

ultraviolet rays ionize the air surrounding the electroscop

D

the disc becomes hot and thermionic emission take palce

Text Solution

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The correct Answer is:
B
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