A tuning fork produce 2 beats when sounded with one oscillator of frequency 514 Hz, and produces 6 beats with the other oscillator of frequency 510 Hz. The frequency of tuning fork is
516 Hz
510 Hz
514 Hz
520 Hz
A.
516 Hz
Tuning fork produces 2 beats with oscillator of 514 Hz.
∴ Frequency of tuning fork
n1 = 514 ± 2
= 516 or 512 Hz
Similarly, n2 = 510 ± 6 = 514 or 504 Hz
∴ Frequency of tuning fork = 516 Hz
If a liquid does not wet a solid surface, then its angle ofcontact is
acute angle
obtuse angle
right angle
None of these
To hear the echo in 1 s, the minimum distance of the source from the reflecting surface should be
28 m
18 m
19 m
165 m
If length of a simple pendulum increases by 300%, then its time period increases by
100 %
200 %
300 %
400 %
When a force F is applied on a wire oflength L and radius r, extension produce is l. If same force F is applied on the same material wire of length 2 L and radius 2r, then extension will be
l
2l
l/2
4l
If tension of sonometer wire is made four times, then its frequency will change by a factor of
2
4
1/2
6