Physics Test - ...

In a hollow spherical shell, potential (V) changes with respect to distance (s) from centre as :

A circular coil of 20 turns and radius 20 cm is mounted vertically with its plane in magnetic meridian. A small magnetic needle is placed at the centre of the coil. When a current is passed through the coil, the needle is deflected through 45^o . If the horizontal component of Earth's field is 0.34 x 10^-4 T, the current in the coil is:

The potential energy (in joules) of a mass of 2 kg of mass moving in the xy plane is given by U = 6x + 8y, where positions x and y are measured in meters. If the body is resting at a point (6 m, 4 m) at time t (0), it will cross the y-axis equal to time

When a material is subjected to a small magnetic field H, the intensity of magnetisation is proportional to

The speed of light will be minimum while passing through-

Under the action of a force F = Cx, the position of a body changes from 0 to x. The work done is

The unit of electrical resistance of a conductor is-

One astronomical unit is the average distance between

The escape velocity from Earth is 11.2 kms^-1. Another planet has mass 1000 times and radius 10 times that of Earth. The escape velocity at that planet will be

Current in a 60 W light bulb when it is connected to a 240 V power supply is___________.