Physics Class 12
Solutions to CBSE Sample Paper - Physics Class 12

Two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.

  1. Both A and R are true and R is the correct explanation of A
  2. Both A and R are true and R is NOT the correct explanation of A
  3. A is true but R is false
  4. A is false and R is also false

Assertion(A) :

The photoelectrons produced by a monochromatic light beam incident on a metal surface have a spread in their kinetic energies.

Reason(R) :

The energy of electrons emitted from inside the metal surface, is lost in collision with the other atoms in the metal.

 

Answer:

a) Both A and R are true and R is the correct explanation of A

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.