Electromagnetic Waves-Electromagnetic Waves & Characteristics (NEET Physics): Questions 11 - 15 of 15

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Question number: 11

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

A light beam travelling in the X-direction is described by the electric field

E=(300Vm)sinω(txc) . An electron is constrained to move along the Y-direction with a speed of 2.0 x 10 7 m/s. Find the maximum magnetic force (in N) on the electron.

Choices

Choice (4) Response

a.

3.2 x 10 -18

b.

5.1 x 10 -16

c.

6.5 x 10 -11

d.

7.8 x 10 -12

Question number: 12

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

A wave is propagating in a medium of dielectric constant 2 and relative magnetic permeability 50. The wave impedance of such a medium is

Choices

Choice (4) Response

a.

1883 Ω

b.

376.6Ω

c.

3776 Ω

d.

Question number: 13

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

The electric field of a plane electromagnetic wave in vacuum is represented by

Ex=0,Ey=0.5cos[2π×108(txC)]andEZ=0 . Determine the wavelength of the wave.

Choices

Choice (4) Response

a.

5m

b.

4 m

c.

6 m

d.

3 m

Question number: 14

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

A magnetic field of a plane electromagnetic wave is given by B = 2x10 7 sin (0.5x10 3 x + 1.5x10 11 t) T. Frequency of the wave is,

Choices

Choice (4) Response

a.

33.9 GHz

b.

13.9 GHz

c.

23.9 GHz

d.

12.9 GHz

Question number: 15

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

Light is an electromagnetic wave. Its speed in vacuum is given by the expression,

Choices

Choice (4) Response

a.

μ0ε0

b.

ε0μ0

c.

μ0ε0

d.

1μ0ε0

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