Wave Optics Test

Result

Wave Optics Test - 46

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Weekly Quiz Competition

Question 1
4 / -1

If a source is transmitting electromagnetic wave of frequency 8.2 × 10⁶ Hz, then wavelength of the electromagnetic waves transmitted from the source will be

A
36.6 m

B
40.5 m

C
42.3 m

D
50.9 m

Solution
Question 2
4 / -1

In an apparatus, the electric field was found to oscillate with an amplitude of 18 V/m. The magnitude of the oscillating magnetic field will be

A
4 × 10^–6 T

B
6 × 10^–8 T

C
9 × 10^–9 T

D
11 × 10^–11 T

Solution
Question 3
4 / -1

According to Maxweell\'s hypothesis, a changing electric field given rise to

A
An e.m.f.

B
Electric current

C
Magnetic field

D
Pressure radiant
Question 4
4 / -1

In an electromagnetic wave, the electric and magnetizing fields are 100 Vm^–1 and 0.265 Am^–1. The maximum energy flow is

A
26.5 W/m²

B
36.5 W/m²

C
46.7 W/m²

D
None of these

Solution
Question 5
4 / -1

The 21 cm radio wave emitted by hydrogen in interstellar space in due to the interaction called the hyperfine interaction is atomic hydrogen. The energy of the emitted wave is nearly

A
10^–17 Joule

B
1 Joule

C
7 × 10^–8 Joule

D
10^–24 Joule

Solution
Question 6
4 / -1

TV waves have a wavelength range of 1-10 meter. Their frequency range is MHz is

A
30-300

B
3-30

C
300-3000

D
3-3000

Solution
Question 7
4 / -1

Maxwell\'s equations describe the fundamental laws of

A
Electricity only

B
Magnetism only

C
Mechanics only

D
Both (a) and (b)
Question 8
4 / -1

The oscillating electric and magnetic vectors of an electromagnetic wave are oriented along

A
The same direction but differ in phase by 90°

B
The same direction and are in phase

C
Mutually perpendicular directions and are in phase

D
Mutually perpendicular directions and differ in phase by 90°

Solution
Question 9
4 / -1

In which one of the following regions of the electromagnetic spectrum will the vibrational motion of molecules give rise to absorption

A
Ultraviolet

B
Microwaves

C
Infrared

D
Radio waves
Question 10
4 / -1

An electromagnetic wave travels along z-axis. Which of the following pairs of space and time varying fields would generate such a wave?

A
E_x, B_y

B
E_y, B_x

C
E_z, B_x

D
E_y, B_z

Solution