Ch 8. Electromagnetic Waves

Question 1

The formula for magnetic energy density for a solenoid is

Answer 1

B²/2μ0

Question 2

Which of the following electromagnetic radiations has minimum wavelength?

Answer 2

γ-rays (gamma rays)

Question 3

The phase difference between electric wave and magnetic wave in the electromagnetic wave is

Answer 3

Zero

Question 4

Nature of electromagnetic waves is

Answer 4

Transverse

Question 5

Which of the following is not electromagnetic wave?

Answer 5

Sound waves

Question 6

The dimensional formula for 1/2 ε₀ E² is identical to that of

Answer 6

B²/2µ₀

Question 7

The unit of ratio of magnetic field B and electric field E, (B/E) is

Answer 7

sm⁻¹

Question 8

The direction of propagation of electromagnetic wave is

Answer 8

Parallel to B × E

Question 9

Which among the following rays is not deflected by electric field?

Answer 9

γ-ray

Question 10

Statement 1 : electromagnetic waves are transverse in nature.

Statement 2 : Electromagnetic waves can be polarized.

Answer 10

Both the statements are true and statement 2nd is the correct explanation of statement 1st

Question 11

Which of the following is correct for speed of electromagnetic wave in vacuum?

Answer 11

c = 1/√µ ε₀