Electromagnetic Waves Test

Result

Electromagnetic Waves Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Velocity of electromagnetic waves in a medium depends upon

A
thermal properties of the medium

B
mechanical and electrical properties of the medium

C
electrical and magnetic properties of the medium

D
mechanical and magnetic properties of the medium
Question 2
1 / -0

In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of 2.0 × 10¹⁰ Hz. What is the wavelength of the wave?

A
1.0 cm

B
1.5 cm

C
2.0 cm

D
3.0 cm
Question 3
1 / -0

Which of these mechanisms can be used to produce electromagnetic waves?

A
point charge travelling in a straight line with constant velocity

B
point charge oscillating in simple harmonic motion

C
point charge drifting slowly

D
stationary point charge

Solution

This charge produces an oscillating electric field in its neighbourhood. This field in turn, produces an oscillating magnetic field in its neighbourhood. The process continues as both the fields acts as source of each other. Hence an em wave originates from the oscillating charge.

Note: The frequency of em wave is equal to frequency of oscillating charge.
Question 4
1 / -0

An electromagnetic wave is produced by oscillating electric and magnetic fields E and B, respectively. Choose the incorrect statement from the given alternatives.

A
E is perpendicular to B.

B
E is perpendicular to the direction of propagation of the wave.

C
B is perpendicular to the direction of propagation of the wave.

D
E is parallel to B.
Question 5
1 / -0

Which of the following statements is false?

A
Electromagnetic waves are transverse.

B
Electromagnetic waves travel in free space at the speed of light.

C
Electromagnetic waves travel with the same speed in all media.

D
Electromagnetic waves are produced by an accelerating charge.