Multiple Choice Questions

 Chapter 8 Electromagnetic Wave 

Q-1 Name the first person to give a practical demonstration of the production of electromagnetic wave?

(a) Hertz 

(b) Newton

(c) Marconi

(d) Bose

Answer : a

Q-2- What is the wavelength of an e.m wave of frequency 2MHz?

(a) 300 m 

(b) 400 m 

(c) 150 m

(d) 600 m

Ans. :- c 

Q-3- E.M Waves are produced by 

(a) Charge at rest 

(b) Acclerated charge particle 

(c) Magnetic field

(d) Charge in uniform motion 

Ans. :- b

Q-4- In which layer ozone is found 

(a) Exosphere

(b) Ionosphere 

(c) Stratosphere

(d) Mesosphere

Ans. :- c

Q-5- Ozone layer protect us from the ill effect of 

(a) Alpha rays

(b) Beta rays 

(c) Gamma rays 

(d) UV rays 

Ans. :- d