Class – XII (Year 2011)
Subject – Physics - SET- 3

General Instructions:
(i) All questions are compulsory.
(ii) Marks for each question are indicated against it.
(iii) Use of Calculators is not permitted.

1. Define the term 'threshold frequency' in relation to photoelectric effect.
2. What is the function of a 'Repeater' in a communication system?
3. Write two uses of microwaves.

(E-Book) CBSE Board Class 12th Papers PDF : Physics

Courtesy: cbse.nic.in