Energy of Wave
Trending Questions
Q. A sinusoidal transverse wave travels on a string of length 4 m and mass 4 g. The wave speed is 20 m/s and the wavelength is 0.2 m. If the wave is to have an average power of 50 W, then
- tension induced in the string is 0.4 N.
- frequency of wave will be 100 Hz.
- linear mass density of the given string must be 10−3 kg/m.
- amplitude of the wave will be 11.25 cm
Q. A harmonic wave propagates in a medium. Find the average energy density of the wave, if at any point, the energy density becomes equal to W0 at an instant t=t0+T/6, where t0 is the instant when amplitude is maximum at this location and T is the time period of oscillation.
- 32W0
- W02
- 2W0
- 2W03
Q. A taut string for which μ=15×10−2 kg/m is under a tension of 240 N. How much power must be supplied to the string to generate sinusoidal waves at a frequency of 18.0 Hz and an amplitude of 18 cm?
- 1280 W
- 1300 W
- 1240 W
- 1220 W
Q. A transverse wave of amplitude 0.5 mm and frequency 100 Hz is produced on a wire stretched to a tension of 100 N. If the wave speed is 100 m/s. What average power is the source transmitting to the wire?
- 60 mJ/s
- 49 mJ/s
- 40 mJ/s
- 70 mJ/s