A. 20000 to 30000 hertz
B. 10 to 20 hertz
C. 2000 to 4000 hertz
D. 6000 to 8000 hertz
Related Mcqs:
- 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 ?
A. 1/4f
B. 1/2f
C. frequency lower than 20 Hz
D. 2f - Fundamental frequency of stationary waves in open pipe is ______________ times the frequency in closed pipe?
A. One
B. Two
C. Four time
D. None of these - A sensitive galvanometer gives full-scale deflection with 100 mV. If the resistance of the galvanometer is 50? the maximum current that can flow through safely is__________________?
A. 2.0 mA
B. 20 mA
C. 200 mA
D. 0.2 mA - Galvanometer is a very sensitive device with______________________?
A. very low damping
B. very high damping
C. no damping at all
D. radial field disintegration - Which one is the correct relation for fundamental frequency of open and closed pipe ?
A. fopen = 2 fclosed
B. fclosed = 2fopen
C. fopen = fclosed
D. fopen = 1 / f closed - If stretching force T of wire increases, then its frequency __________________?
A. decreases
B. increases
C. remains the same
D. any of above - Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are__________________?
A. Longitudinal
B. Transverse
C. Periodic
D. both A and C - The beats frequency (sensible) for a human car is _____________________?
A. 42Hz
B. 7 Hz
C. 256Hz
D. 262Hz - An alternating current is represented by the equation I = I∫sinπt which of the following equation represents an alternating current of frequency and amplitude twice that of the above current ?
A. I = 2I∫Sin(πt/2)
B. I = 2I∫Sin(2πt)
C. I = 2ISinπt
D. I = I∫sin(2πt) - S.I unit of frequency is_________________?
A. Vibration S-2
B. Radian
C. Hertz
D. ms-1
