Physics

The angle between the plane of vibration and plane of polarization is

Magnification at least distance of distinct vision by simple microscope having focal length 2.5 cm is

A ray of light strikes a silvered surface as shown inclined to another one. Then the net deviation of the reflected rays will be

A circuit is made up of resistance 3 Ω and inductance 0.01 H. An alternating emf of 100 V at 50 Hz is connected, then the phase difference between the current and the emf in the circuit is

A 0.2 m long conductor carrying a current of 20 A is held perpendicular to magnetic field of 2.5 mT. The mechanical power required to move the conductor with speed 2 m/s perpendicular to length and field is

The relative permeability (µr) of a substance is related to its susceptibility () as

A long solenoid has 1000 turns per meter length of solenoid. A current of 3.2 A flow through it. The magnetic induction at the end of solenoid is

A battery of emf, 20 V is connected to resistances as shown in figure. The potential at the point C will be

Ohm's law is valid if

A cube of side a has charge q at two diagonally opposite vertices as shown in the figure. The net electric potential at the centre of the cube will be