Question

Photons with energy 5 eV are incident on a cathode C in a photoelectric cell. The maximum energy 2 eV. When photons of energy 6 eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is

(a) + 3V
(b) + 4V
(c) - 1 V
(d) - 3V​

Answer 1

Answer:

see the attachment ☺️

Explanation:

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Answer 2

Answer:

option 4

Explanation:

threshold potential of C=5-2 3eV

in second case when photon of 6eV

is incident threshold potential will remain

same so mex KF of emmited electrons

=6-3=3eV so stoping potential is - 3eV

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