Physics Test - ...

In a Wheatstone's network,  The resistance with which S is to be shunted in order that the bridge may be balanced is:

The dimensional formula for entropy is:

A lawn roller is pulled along a horizontal surface through a distance of 20 m by a rope with a force of 200 N. If the rope makes an angle of 60∘ with the vertical while pulling, the amount of work done by the pulling force is:

Water rises up to a height h in a capillary tube of a certain diameter. This capillary tube is replaced by a similar tube of half the diameter. Now water will rise to the height of k.h, find k.

If the earth were to suddenly contract to half its present size, without any change in its mass, the duration of the new day be:

A voltage of peak value 283 V and varying frequency is applied to series LCR combination in which R=3Ω,L=25mH and C=400uF. Then the frequency (in Hz) of the source at which maximum power is dissipated in the above is:

A parallel plate capacitor with air as the dielectric has capacitance C. A slab of dielectric constant K and having the same thickness as the separation between the plates is introduced so as to fill one-fourth of the capacitor as shown in the figure. The new capacitance will be:

Two particles execute S.H.M. of the same amplitude and frequency along the same straight line from the same mean position. They cross one another without collision when going in the opposite direction, each time their displacement is half of their amplitude. The phase difference between them is:

A boat which has a speed of 5 kmhr⁻¹ in still water crosses a river of width 1 km along the shortest possible path in 15 minutes. The velocity of the river water in kmhr⁻¹ is:

The molar specific heat of oxygen at constant pressure 

The amount of heat taken by 5 moles of oxygen when heated at constant volume from 10^∘C to 20^∘C will be approximately.