SATHEE: Dual Nature Of Light Question 89

Dual Nature Of Light Question 89

Question: When an inert gas is filled in the place vacuum in a photo cell, then [MP PMT 1997]

Options:

A) Photo-electric current is decreased

B) Photo-electric current is increased

C) Photo-electric current remains the same

D) Decrease or increase in photo-electric current does not depend upon the gas filled

Show Answer

Answer:

Correct Answer: B

Solution:

In the presence of inert gas photoelectrons emitted by cathode ionise the gas by collision and hence the current increases.

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Dual Nature Of Light Question 89

Question: When an inert gas is filled in the place vacuum in a photo cell, then [MP PMT 1997]

Options:

Answer:

Solution:

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