Physics Test - ...

In an electron gun, the electrons are accelerated by the potential V. If e is the charge and m is the mass of an electron, then the maximum velocity of these electrons will be

A bar magnet dropped into a coil of a conducting wire, along its axis, will fall with an acceleration

A generator at a utility company produces 100 A of current at 4000 V. The voltage is stepped up to 240000 V by a transformer before it is sent on a high voltage transmission line. The current in transmission line is

A 220 V, 1000 watt bulb is connected across a 110 V mains supply. The power consumed will be

Consider the situation in the figure. The work done in taking a point charge from P to Ais WA, from P to B is WB and from P to C is WC.

A dust particle of mass 10^-3 gm is stationary between the plates of a horizontal parallel plate capacitor of 0 .016m separation which is connected to a voltage of 100V. How many fundamental charges (e = 1.6 x 10-19 C) the dust particle carries

A charge q is placed at the corner of a cube of side l. The electric flux passing through the cube is

A capacitor of capacity C₁ is charged upto V volt and then connected to an unchanged capacitor of capacity C₂. The potential difference across each capacitor will be

Dielectric constant of a medium is unity. Its permittivity will be:

If a current is passed in a spring, it