Electromagnet Spectrum – Online MCQs – Physics 10th

1. It has been used for security purposes, particularly in military technology.

Ultraviolet rays

Microwaves

Radio waves

Infrared waves

2. The colour that is least deviated by a prism:

Red ray

Yellow ray

Green ray

Violet ray

3. Which of the following statement is false for the properties of electromagnetic waves?

The energy in electromagnetic waves is divided equally between electric and magnetic field vectors.

These waves do not require any material medium for propagation.

Both electric and magnetic field, vectors are parallel to each other and perpendicular to the direction of propagation of the wave.

Both electric and magnetic field vectors attain the maxima and minima at the same place and same time.

4. They are produced when fast moving electrons lose their energy quickly.

Infrared

gamma rays

x-rays

Microwaves

5. Light year is a unit of:

time

None of these

distance

speed

6. The waves used by artificial satellites for communication are:

microwaves

radio waves

infrared waves

x-rays

7. This colour has minimum speed, which with most deviation.

Blue

Violet

Green

Red

8. The list that shows electromagnetic waves in order of increasing wavelength is:

Microwaves, X-rays, Gamma-rays

Microwaves, Gamma-rays, X-rays

X-rays, Gamma-rays, Microwaves

Gamma-rays, X-rays, Microwaves

9. This kind of lamp is used in sunbeds for artificial tanning.

Gamma rays

Ultraviolet

Infrared

Microwave

10. Electromagnetic waves are:

longitudinal and mechanical waves

transverse waves

mechanical waves

longitudinal waves

11. Ultraviolet radiation is further divided into:

three bands

five bands

four bands

two bands

12. It uses a series of low frequency x-rays and a computer to produce a 3D image of soft tissues and bones.

Computed Tomography (CT) scan

Industrial radiography

x-rays

Radiation Therapy

13. The ultra-high frequency band of radio waves in the electromagnetic wave is used as in:

cellular phone communication

television

commercial FM radio

Both television and cellular phone

14. It has the longest wavelength in the electromagnetic spectrum.

Microwaves

Radio waves

X-rays

Gamma rays

15. Which among the following has the maximum penetrating power?

Microwaves

Ultraviolet radiation

Radio waves

Gamma rays

16. It has the highest wavelength of all the colours.

Yellow

Orange

Violet

Red

17. Which of the following has a minimum wavelength?

Infrared rays

Microwave

Gamma rays

Blue light

18. Waves in decreasing order of their wavelength are:

radio waves, ultraviolet rays, visible rays, x-rays.

radio waves, infrared rays, visible rays, x-rays.

radio waves, visible rays, infrared rays, x-rays.

x-rays, infrared rays, visible rays, radio waves

19. Select the wrong statement. Electromagnetic waves:

are transverse in nature

are produced by accelerating charges

travel in free space at a speed of light

travel in all media with the same speed

20. The structure of solids is investigated by using:

microwaves

x-rays

infrared rays

gamma rays

Online MCQs Test | Unit 12 : Electromagnet Spectrum | Physics Class 10th | Sindh Board Science Group