Category: Waves

A simple pendulum has a bob of mass m and its frequency is f. If we replaced the bob with a heavier one say of 2m then that will be its new frequency ?

Hamad Waves 09/09/2020

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A. 1/4f
B. 1/2f
C. frequency lower than 20 Hz
D. 2f

When the source of sound moves away form a stationary listener then ______________ occurs?

Hamad Waves 19/08/2020

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A. an apparent increase in frequency
B. an apparent decrease in frequency
C. an apparent decrease in wavelength
D. no apparent change in frequency

The normal ear is the most sensitive in the frequency range___________________?

Hamad Waves 10/08/2020

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A. 20000 to 30000 hertz
B. 10 to 20 hertz
C. 2000 to 4000 hertz
D. 6000 to 8000 hertz

Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________?

Hamad Waves 05/07/2020

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A. Dopplers effect
B. Interference of waves
C. Beats phenomena
D. All of these

Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are__________________?

Hamad Waves 02/07/2020

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A. Longitudinal
B. Transverse
C. Periodic
D. both A and C

The beats frequency (sensible) for a human car is _____________________?

Hamad Waves 12/05/2020

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A. 42Hz
B. 7 Hz
C. 256Hz
D. 262Hz