Question

Light of wavelength  falls on a cathode plate inside a vacuum tube as shown in the figure. The work function of the cathode surface is  and the anode is a wire mesh of conducting material kept at a distance d from the cathode. A potential difference V is maintained between the electrodes. If the minimum de Broglie wavelength of the electrons passing through the anode is , which of the following statement(s) is(are) true?

expand
A

increases at the same rate as for

B

is approximately halved, if d is doubled

C

decreases with increase in and

D

For large potential difference is approximately halved if V is made four time

Hard
JEE Advanced

Solution

verified
Verified by Toppr
Correct option is
D

For large potential difference is approximately halved if V is made four time

minimum be broglie wavelength.




This denies option A, B and C.


Energy of electron,



This supports option D.

Video Explanation

play-icon
Solve any question of Dual Nature of Radiation And Matter with:-

Was this answer helpful?

upvote 0
downvote0