Electromagnetic Waves MCQs with Answers

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Electromagnetic Waves Online Quiz

By presenting 3 options to choose from, Electromagnetic Waves Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Electromagnetic Waves Questions and Answers and click over the correct answer.

• Test Name: Electromagnetic Waves MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Electromagnetic Waves

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1 / 40

Which type of electromagnetic wave is often used in security systems?

a) infrared

c) ultraviolet

b) radio waves

2 / 40

Which electromagnetic wave is absorbed by the ozone layer?

c) radio waves

b) infrared

a) ultraviolet

3 / 40

The electromagnetic spectrum includes ________.

a) visible light

c) ocean waves

b) sound waves

4 / 40

Which electromagnetic wave has the lowest frequency?

a) radio waves

c) ultraviolet

b) X-rays

5 / 40

Electromagnetic waves transfer ________.

b) mass

c) volume

a) energy

6 / 40

Which electromagnetic wave has the longest wavelength?

b) gamma rays

c) ultraviolet

a) radio waves

7 / 40

Which type of electromagnetic waves can penetrate the Earth's atmosphere?

a) radio waves

c) X-rays

b) gamma rays

8 / 40

Electromagnetic waves travel in ________.

c) circular paths

b) zigzag paths

a) straight lines

9 / 40

Which electromagnetic wave can cause damage to living tissues?

c) visible light

a) gamma rays

b) radio waves

10 / 40

The electromagnetic waves used in MRI machines are ________.

c) X-rays

a) radio waves

b) microwaves

11 / 40

X-rays are used for ________.

a) medical imaging

b) cooking

c) communication

12 / 40

The electromagnetic waves used in radar are ________.

c) ultraviolet

a) microwave

b) infrared

13 / 40

The process of bending of light waves due to a change in speed is called _____.

a) refraction

c) diffraction

b) reflection

14 / 40

The electromagnetic waves used in Wi-Fi are ________.

c) ultraviolet

a) microwaves

b) infrared

15 / 40

The speed of light in a vacuum is _______.

c) 9 × 10^8 m/s

b) 6 × 10^8 m/s

a) 3 × 10^8 m/s

16 / 40

Microwaves are used in ________.

a) cooking

b) communication

c) medical imaging

17 / 40

The electromagnetic waves used in satellite communication are ________.

c) ultraviolet

b) infrared

a) microwaves

18 / 40

Which type of electromagnetic waves can be used in cancer treatment?

c) infrared

a) X-rays

b) radio waves

19 / 40

Which electromagnetic wave has the highest energy?

b) radio waves

a) gamma rays

c) infrared waves

20 / 40

The electromagnetic waves used in night vision goggles are ________.

b) ultraviolet

a) infrared

c) microwave

21 / 40

The range of radio waves is typically from ________.

b) Hz to MHz

a) kHz to GHz

c) THz to PHz

22 / 40

The range of visible light in nanometers is ________.

b) 100-200

a) 400-700

c) 800-1000

23 / 40

The phenomenon of a wave bending around obstacles is called _____.

c) refraction

b) reflection

a) diffraction

24 / 40

Which type of electromagnetic waves has the shortest wavelength?

b) radio waves

a) gamma rays

c) visible light

25 / 40

The electromagnetic waves used in photography are ________.

a) visible light

c) gamma rays

b) X-rays

26 / 40

Radio waves are used for ________.

b) cooking

a) communication

c) medical imaging

27 / 40

Which type of electromagnetic wave can be used to sterilize medical equipment?

a) ultraviolet

b) X-rays

c) microwaves

28 / 40

Electromagnetic waves are produced by ________.

c) heat energy

a) vibrating charges

b) sound waves

29 / 40

Which electromagnetic wave has the highest frequency?

a) gamma rays

b) radio waves

c) infrared waves

30 / 40

Which electromagnetic wave is often used in astronomy to observe celestial objects?

c) gamma rays

a) radio waves

b) ultraviolet

31 / 40

Which electromagnetic wave is used in cooking appliances?

a) microwaves

b) infrared

c) ultraviolet

32 / 40

Which type of electromagnetic wave can cause sunburn?

b) infrared

c) radio waves

a) ultraviolet

33 / 40

The color of visible light with the shortest wavelength is _____.

c) green

a) violet

b) red

34 / 40

Infrared waves have _______ wavelengths compared to visible light.

b) shorter

a) longer

c) equal

35 / 40

The unit of wavelength of electromagnetic waves is ________.

c) Hertz (Hz)

a) meters (m)

b) seconds (s)

36 / 40

What is the unit of frequency of electromagnetic waves?

a) Hertz (Hz)

b) Newton (N)

c) Pascal (Pa)

37 / 40

Infrared waves are used for ________.

c) medical imaging

a) remote control

b) cooking

38 / 40

The color of visible light with the longest wavelength is _____.

a) red

c) green

b) violet

39 / 40

Ultraviolet rays have _______ wavelengths compared to visible light.

a) shorter

b) longer

c) equal

40 / 40

The lowest frequency electromagnetic wave is _____.

b) gamma rays

c) X-rays

a) radio waves

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