A source of sound of frequency 256 Hz is moving rapidly towards a wall with a velocity of 5 m/s. The speed of sound is 300 m/s. If the observer is between the wall and […]
A particle moves along a circle of radius 20/π m with constant tangential acceleration. If the velocity of the particle is 80m/s at the end of the second revolution after motion has begun, the tangential […]
A 6 volt battery is connected to the terminals of a three metre long wire of uniform thickness and resistance of 100 ohm. The difference of potential between two points on the wire separated by […]
One mole of an ideal gas at an initial temperature of T K, does 6R joule of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume […]
In the Young’s double slit experiment, a point P on the central bright fringe is such that intensity of point P is 1/4 times the maximum intensity, distance between the slits is d and wavelength […]
A transistor is operated in common emitter configuration at constant collector voltage Vc = 1.5 V such that a change in the base current from 100 µA to 150 µA produces a change in the […]
A particle in simple harmonic motion is described by the displacement function x(t) = A cos(wt+θ). If the initial (t=0) position of the particle is 1 cm, its initial velocity is π cm/s, and its […]
Two particles are oscillating along the same line with the same frequency and same amplitude. They meet each other at a point mid way between the mean position and extreme position while going in the […]
In stretching a spring by 2 cm, energy stored is given by U. Had is been stretched by 10 cm, energy stored will be
Options
(a) U (b) 25U (c) U/25 (d) 5U
Two identical flutes produce fundamental notes of frequency 300 Hz at 27° C. If the temperature of air in one flute is increased to 31° C, the number of beats heard per sec will be […]
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