Assertion : Stopping potential is a measure of K.E. of photo-electrons.

Question

Direction Read the following question choose if: 

(a) Both Assertion and Reason are true and Reason is correct explanation of Assertion. 

(b) Both Assertion and Reason are true, but Reason is not correct explanation of Assertion. 

(c) Assertion is true but the Reason is false. 

(d) Both Assertion and Reason is false. 

Assertion : Stopping potential is a measure of K.E. of photo-electrons. 

Reason : W = eVs = (1/2) mv² = K.E 

(A) a 

(B) b 

(C) c 

(D) d

Answer 1

The correct option is (D) d.

Explanation:

Stopping potential is the maximum kinetic energy of photoelectron and (1/2) mV_max² = KE_max = eV_s 

Hence both statements are false.