Electromagnetic...

The north pole of a long horizontal bar magnet is being brought closer to a vertical conducting plane along the perpendicular direction. The direction of the inducedcurrent in the conducting plane will be

The magnetic field in a coil of 100 turns and 40 square cm area is increased from 1 tesla to 6 tesla in 2 second. The magnetic field is perpendicular to the coil. The e.m.f. generated in it is

A wire of length 50 cm moves with a velocity of 300 m/min, perpendicular to a magnetic field. If the e.m.f. induced in the wire is 2 V, the magnitude of thefield in tesla is

Lenz\'s law gives

A metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in horizontal direction, so that the pendulum now swings through the field, the pendulum will

In a circuit with a coil of resistance 2 ohms, the magnetic flux changes from 2.0 Wb to 10.0 Wb in 0.2 second. The charge that flows in the coil during thistime is

The direction of induced current is such that it opposes the very cause that has produced it. This is the law of

A solenoid is 1.5 m long and its inner diameter is 4.0 cm. It has three layers of windings of 1000 turns each and carries a current of 2.0 amperes. The magnetic flux for a cross-section of the solenoid is nearly

A coil of 40 Ω resistance has 100 turns and radius 6 mm is connected to ammeter of resistance of 160 ohms. Coil is placed perpendicular to the magnetic field. When coil is taken out of the field, 32 μC charge flows through it. The intensity of magnetic field will be

A magnetic field of 2 × 10^–2 T acts at right angles to acoil of area 100 cm² with 50 turns. The average e.m.f. induced in the coil is 0.1 V, when it is removed from thefield in time t. The value oft is