Electromagnet Spectrum – Online MCQs – Physics 10th

1. Which of the following has a minimum wavelength?

Microwave

Infrared rays

Blue light

Gamma rays

2. They are highly penetrating that can pass through flesh but not bones.

The long-wavelength x-rays

both of these

None of them

The low frequency x-rays

3. What are the two colours that emerge from Prism’s two extreme ends?

Yellow and Orange

Violet and Red

Red and Orange

Blue and Green

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

commercial FM radio

television

Both television and cellular phone

cellular phone communication

5. The type of waves that are used in the television remote controllers:

Radio waves

Visible light

Ultraviolet waves

Infrared waves

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

Microwaves, Gamma-rays, X-rays

Microwaves, X-rays, Gamma-rays

Gamma-rays, X-rays, Microwaves

X-rays, Gamma-rays, Microwaves

7. Stars are natural transmitters of:

x-rays

microwaves

radio waves

ultraviolet rays

8. The velocity of light in a diamond is: (whereas the refractive index of a diamond with respect to vacuum is 2.5)

5 x 10⁸ m/s

1.2 x 10⁸ m/s

1.2 x 10¹⁰ m/s

2.5 x 10⁸ m/s

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

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

These waves do not require any material medium for propagation.

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

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

10. Which statement is TRUE about the red light?

It penetrates through rain mist, and fog

It can travel the longest distance

All of them

The air molecules least scatter it

11. The human body also gives out:

radio waves

microwaves

x-rays

infrared radiations

12. Electromagnetic waves are:

longitudinal and mechanical waves

mechanical waves

longitudinal waves

transverse waves

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

Gamma rays

Microwave

Infrared

Ultraviolet

14. They are produced when the nuclei of unstable atoms decay into a stable nucleus or lose energy.

Microwave

Infrared

Gamma rays

Ultraviolet

15. All electromagnetic waves travel through space or vacuum at the same speed of:

both of these

3 x 10⁸ m/s

None of these

300000 km/s

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

Industrial radiography

Computed Tomography (CT) scan

x-rays

Radiation Therapy

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

Radio waves

Gamma rays

Microwaves

Ultraviolet radiation

18. Select the wrong statement. Electromagnetic waves:

travel in free space at a speed of light

are produced by accelerating charges

travel in all media with the same speed

are transverse in nature

19. It is a cancer treatment that uses controlled doses of high-frequency x-rays to kill cancerous cells and shrink tumours.

Industrial radiography

x-rays

Computed Tomography (CT) scan

Radiation Therapy

20. The structure of solids is investigated by using:

microwaves

infrared rays

x-rays

gamma rays

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