A ray of light passes through an equilateral glass prism in such a manner that an angle of incidence is equal to the angle of emergence and each of these angles is equal to 3/4 of the angle of prism. The angle of deviation is
A long solenoid has 500 turns, when a current of 2A is passed through it, the resulting flux linked with each turns of solenoid is 4 x 10-3 Wb, then the self induction of solenoid is
An alternating current is given by i = i1 sin ωt + i2 cos ωt. The r.m.s. current is given by
A circular coil of wire of radius 'r' has 'n' turns and carries a current ' I '. The magnetic induction 'B' at a point on the axis of the coil of distance √3 r from its center is
Two tiny sphere carrying a charges 1.8 µC and 2.8 µC are located at 40 cm apart. The potential at the mid-point of the line joining the two charges is
In an atom electrons revolve around the nucleus along a path of radius 0.72 A making 9.4 x 1014 revolutions per second. The equivalent current is. (Given e = 1.6 x 10-19 C)
An electric dipole with dipole moment 4 x 10-9 Cm is aligned at 30 degree with the direction of the uniform electric field of magnitude 5 x 104 NC-1. The magnitude of the torque acting on the diapole is
Four charges +q, +2q, +q and -2q are placed at the corner of square ABCD respectively. The force on unit positive charge kept at the centre 'O' is
Electrical as well as gravitational effects can be thought to be caused by fields. Which of the following is true for an electrical and gravitational field ?
The displacement of a particle executing SHM is given by X = 3 sin [2πt + π/4] , where 'X' is in meter and 't' is in second. The amplitude and maximum speed of the particle is
The electric field and the potential of an electric dipole vary with distance 'r' as