If the velocity of source moving towards a stationary observer is equal to half the velocity of wave. What is percentage increase in apparent frequency?
A) 100%
B) 75%
C) 50%
D) 25%

An observer moves towards a stationary source of sound with a velocity one-fifth of the velocity of sound. What is the percentage increase in the apparent frequency?

An observer moves towards a stationary source of sound. The percentage change in the apparent frequency is

In Dopplers effect, when a source moves towards a stationary observer, the apparent increase in frequency is due to

If each edge of a cube is increased by 50%, the percentage increase in its surface area is 50% (b) 75% (c) 100% (d) 125%

If the length of a conductor is increased by 100% keeping its area of cross-section constant, the percentage increase in its resistance is

If each edge of a cube is increased by 25%, then the percentage increase in its surface area is: (a) 25% (b) 50% (c) 56.25%

A source of sound is travelling towards a stationary observer. The frequency of sound heard by the observer is 25% more that the actual frequency. If the speed of sound is v, that of the source is

In the non-relativistic regime, if the momentum, is increased by 100%, the percentage increase in kinetic energy is

At a constant temperature what should be the percentage increase in pressure for a 10% decrease in the volume of gas ? (a) 11% (b) 20% (c) 5% (d) 50%

A source of sound emitting a note of frequency 200 Hz moves towards an observer with a velocity v equal to the velocity of sound. If the observer also moves away from the source with the same velocity v, the apparent frequency heard by the observer is