Central Board of Secondary Education
Class – XII (Year 2009)
Subject – Physics - (Delhi)
(i) All questions are compulsory.
(ii) Marks for each question are indicated against it.
(iii) Use of Calculators is not permitted.
- What is sky wave propagation ?
- Write the Following radiations in ascending order in respect of
X-rays, Microwaves, UV rays and radio waves.
- By what percentage will the transmission range of TV tower be affected
when the height of the tower is increased by 21%?