Test SeriesFree PYQsExamsPricing

MHT CET Physics question

PhysicsWavesMHT CET

A person speaking normally produces a sound intensity of 40 dB at a distance of 1 m. If the threshold intensity for reasonable audibility is 20 dB, the maximum distance at which person can be heard clearly is

Answer: (C)

Solution

A fall of 20 dB means the intensity drops to ; since , m, so m; at 4 m, 5 m and

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-068661