Question

Assertion (A): We cannot hear the sound of a bell ringing in a closed jar after most of the air is pumped out.

Reason (R): Sound requires a medium to travel.

Choose the correct statement:

विकल्प

• Both A and R are true, but R is not the correct explanation of A.

• Both A and R are true, and R is the correct explanation of A.

• A is true, but R is false.

• A is false, but R is true.

Answer 1

Both A and R are true, and R is the correct explanation of A.

Explanation:

The assertion is true because sound cannot be heard in a near vacuum, and this is correctly explained by the fact that sound needs a material medium to propagate.