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Science MCQs

Practice multiple choice questions with instant feedback. Select an option to see if you're correct.

Total Questions
2100
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Question 1081 Medium

How does frequency affect the energy of a wave?

A
Higher frequency means more energy
B
Lower frequency means more energy
C
No effect
D
Depends on amplitude
Question 1082 Medium

What is the range of visible light wavelength?

A
300–600 nm
B
200–500 nm
C
500–900 nm
D
400–700 nm
Question 1083 Medium

Which electromagnetic wave has the shortest wavelength?

A
Microwaves
B
Radio waves
C
Visible light
D
Gamma rays
Question 1084 Medium

Which animal can hear infrasonic sounds?

A
Bat
B
Dog
C
Cat
D
Elephant
Question 1085 Medium

Why can't we hear the sound of a vibrating eraser?

A
No vibration
B
Amplitude too low
C
Both a and b
D
Frequency too low
Question 1086 Medium

What happens when you tighten a string in a musical instrument?

A
Loudness decreases
B
Pitch decreases
C
Loudness increases
D
Pitch increases
Question 1087 Medium

What is the speed of sound in water?

A
1500 m/s
B
340 m/s
C
5000 m/s
D
1000 m/s
Question 1088 Medium

What is the speed of sound in iron?

A
5000 m/s
B
340 m/s
C
1500 m/s
D
2000 m/s
Question 1089 Medium

What causes compressions in sound waves?

A
High pressure regions
B
Low pressure regions
C
High frequency
D
Low amplitude
Question 1090 Medium

What causes rarefactions in sound waves?

A
High frequency
B
High pressure regions
C
Low pressure regions
D
Low frequency
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