A body of mass (4m) is lying in x-y plane at rest. It suddenly explodes into three pieces. Two pieces, each of mass (m) move perpendicular to each other with equal speeds (v). The total […]
A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would earth (mass= 5.98×10²⁴ kg) have to be compressed to be a […]
A beam of light of λ=600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between […]
A balloon with mass m is descending down with an acceleration a (where a
Two tuning forks are sounded together and produce 2 beats per second. The frequency of one of them is 288 Hz. The other is loaded with some wax and now they produce four beats per […]
When a sound wave of wavelength λ is propagating in a medium, the maximum velocity of the particle is equal to the wave velocity. The amplitude of wave is
Options
(a) λ (b) λ/2 […]
A car moving with a velocity of 36 km/hr crosses a siren of frequency 500 Hz. The apparent frequency of siren after passing it will be
Options
(a) 520 Hz (b) 485 Hz (c) […]
Two points are located at a distance of 10 m and 15 m from the source of oscillation. The period of oscillation is 0.05 sec and the velocity of the wave is 300m/sec. What is […]
The phase difference between two points seperated by 0.8 m in a wave of frequency 120 Hz is 0.5 π. The wave velocity is
Options
(a) 144 m/s (b) 256 m/s (c) 384 […]
The maximum and minimum intensities of two sources is 4:1. The ratio of amplitude is
Options
(a) 3 : 1 (b) 1 : 3 (c) 1 : √3 (d) √3 : 1
Correct Answer: […]
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