Question

The picture shows three cylinders filled with water to a different extent. The tuning forks L, M and N in vibration produce louder sound when held above the mouth of the cylinders. Which combination is correct for hearing a louder sound of the tuning fork? 

Options

• L - R, M - Q, N - P

• L - P, M - Q, N - R

• L - R, M - P, N - Q

• L - Q, M - R, N - P

Answer 1

L - Q, M - R, N - P

Explanation:

A loud sound is produced when the tuning fork and the air column resonate. The highest-frequency fork L matches the shortest air column Q, while the lowest-frequency fork N matches the longest air column P; M matches R.