Assertion (A) & Reason (B) MCQ

Question 11 Mark

Assertion : The sound which we hear again is called Echo.
Reason : The sensation of sound (Echo) persists in our brain for about 1 s.

Answer

View full question & answer→

Question 21 Mark

Assertion : The speed of sound in air is less than speed of sound in solid.
Reason : If we increase the temperature of medium, the speed of sound increases in any medium.

Answer

(b) Both assertion and reason are true but reason is not the correct explanation of assertion
Reason : The particles in sound are closer in solids than air.

View full question & answer→

Question 31 Mark

Assertion : The sound of thunder is heard a little latter than the flash of light.
Reason : The speed of sound is much less than the speed of light.

Answer

(a) Both Assertion and reason are true and Reason is the correct explanation of Assertion

View full question & answer→

Question 41 Mark

Assertion : As the amplitude of sound increases, the loudness of sound decreases.
Reason : The loudness of sound depends on the amplitude of the wave.

Answer

(d) Assertion is false but reason is true Correct Assertion : As the amplitude of sound decreases, the loudness of sound decreases.

View full question & answer→

MCQ 51 Mark

Assertion : Human beings Cannot hear infrasonic sound.
Reason : Sound with frequency less than 20 Hz is called infrasonic sound.

✓
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B
If both assertion and reason are true but reason is not the correct explanation of assertion.
C
If assertion is true but reason is false.
D
If assertion is false but reason is true.

Answer

Correct option: A.

If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

(a) Both Assertion and Reason are true and Reason . is the correct explanation of Assertion

View full question & answer→

Science Assertion (A) & Reason (B) MCQ

Test yourself on this topic