1

JEE Advanced 2017 Paper 1 Offline

Numerical

+3

-0

A stationary source emits sound of frequency $${f_0} = 492\,Hz.$$ The sound is reflected by a large car approaching the source with a speed of $$2\,m{s^{ - 1.}}$$ The reflected signal is received by the source and superposed with the original.

What will be the beat frequency of the resulting signal in $$Hz$$? (Given that the speed of sound in air is $$330\,m{s^{ - 1}}$$ and the car reflects the sound at the frequency it has received).

What will be the beat frequency of the resulting signal in $$Hz$$? (Given that the speed of sound in air is $$330\,m{s^{ - 1}}$$ and the car reflects the sound at the frequency it has received).

Your input ____

2

JEE Advanced 2015 Paper 2 Offline

Numerical

+4

-0

Four harmonic waves of equal frequencies and equal intensities I

_{0}have phase angles 0, $${\pi \over 3},{{2\pi } \over 3}$$ and $$\pi$$. When they are superposed, the intensity of the resulting wave is nI_{0}. The value of n isYour input ____

3

IIT-JEE 2010 Paper 1 Offline

Numerical

+3

-0

A stationary source is emitting sound at a fixed frequency f_{0}, which is reflected by two cars approaching the source. The difference between the frequencies of sound reflected from the cars is 1.2% of f_{0}. What is the difference in the speeds of the cars (in km per hour) to the nearest integer? The cars are moving at constant speeds much smaller than the speed of sound which is 330 ms^{$$-$$1}.

Your input ____

4

IIT-JEE 2010 Paper 1 Offline

Numerical

+3

-0

When two progressive waves $${y_1} = 4\sin (2x - 6t)$$ and $${y_2} = 3\sin \left( {2x - 6t - {\pi \over 2}} \right)$$ are superimposed, the amplitude of the resultant wave is __________.

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Questions Asked from Waves (Numerical)

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