Electromagnetic Waves Test

Result

Electromagnetic Waves Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

The following question has four choices out of which ONLY ONE is correct.

To detect infrared radiation, we use

A
pyrometer

B
spectrometer

C
bolometer

D
cloud chamber.

Solution

A bolometer is a device used for measuring the power of incident electromagnetic radiation via the heating of a material with a temperature-dependent electrical resistance.
Question 2
1 / -0

The following question has four choices out of which ONLY ONE is correct.

The wavelength of infrared rays is

A
greater than that of visible light

B
less than that of visible light

C
greater or lesser, depending on the source

D
none of these.

Solution

The wavelength of infrared rays is greater than that of visible light
Question 3
1 / -0

The following question has four choices out of which ONLY ONE is correct.

Which of the following is incorrect?

A
Jupiter is an active source of radio emissions

B
Sun is a weak source of X-rays

C
Atmospheric ozone is a principal agent of UV absorption

D
There is nothing common between X-rays, light waves and radio waves.

Solution

X-rays, light waves and radio waves are the transverse waves, they travel with the speed of 3 × 10⁸ m/s in vacuum. They can be reflected, refracted, diffracted and polarised, so we can't say that there is nothing common between them.
Question 4
1 / -0

In a microwave oven, we use electromagnetic oscillators which produce electromagnetic waves in the wavelength range of

A
1 mm to 1 m

B
0.7 μm to 1 mm

C
0.1 μm to 0.7 μm

D
0.1 μm to 0.7 μm

Solution

In a microwave oven, we use electromagnetic oscillators which produce electromagnetic waves in the wavelength range of 1 mm to 1 m.
Question 5
1 / -0

The following question has four choices out of which ONLY ONE is correct.

Who discovered displacement current?

A
Hertz

B
Maxwell

C
Marconi

D
None of these

Solution

Maxwell showed that whenever there is a change in the electric flux, magnetic field is induced; he introduced the concept of the displacement current and modified the Ampere's circuital law.
Question 6
1 / -0

The following question has four choices out of which ONLY ONE is correct.

Displacement current is measured in

A
A

B
C

C
Cs

D
Vm^–1

Solution

Displacement current is measured in A
Question 7
1 / -0

Which of the following is/are associated with telecommunication?

A
Ultraviolet waves

B
Infrared waves

C
Microwaves

D
Visible light

Solution

Microwaves are associated with telecommunication.
Question 8
1 / -0

The following question has four choices out of which ONLY ONE is correct.

Displacement current is the same as

A
rms current

B
peak current

C
conduction current

D
none of these

Solution

Displacement current is the same as conduction current
Question 9
1 / -0

Maxwell, in his famous electromagnetic equations, introduced the concept of

A
AC current

B
DC current

C
displacement current

D
impedance

Solution

Maxwell introduced the concept displacement current.

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Re-Attempt Weekly Quiz Competition

Electromagnetic Waves Test - 2

Result

Electromagnetic Waves Test - 2

Score

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Rank

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SHARING IS CARING

Question 1

pyrometer

spectrometer

bolometer

cloud chamber.

Solution

Question 2

greater than that of visible light

less than that of visible light

greater or lesser, depending on the source

none of these.

Solution

Question 3

Jupiter is an active source of radio emissions

Sun is a weak source of X-rays

Atmospheric ozone is a principal agent of UV absorption

There is nothing common between X-rays, light waves and radio waves.

Solution

Question 4

1 mm to 1 m

0.7 μm to 1 mm

0.1 μm to 0.7 μm

0.1 μm to 0.7 μm

Solution

Question 5

Hertz

Maxwell

Marconi

None of these

Solution

Question 6

A

C

Cs

Vm–1

Solution

Question 7

Ultraviolet waves

Infrared waves

Microwaves

Visible light

Solution

Question 8

rms current

peak current

conduction current

none of these

Solution

Question 9

AC current

DC current

displacement current

impedance

Solution

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Vm^–1