ElectroMagnetic Induction Questions

A long solenoid of diameter 0.1 m has 2 × 104 turns per meter. At the centre of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The...

A long solenoid has 1000 turns. When a current of 4A flows through it the magnetic flux linked with each turn of the solenoid is 4 × 10-3 Wb. The self-inductance of the solenoid is:...

The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA. This inductor is of inductance :-

In the circuit shown here, the point ′C′ is kept connected to point ′A′ till the current flowing through the circuit becomes constant. Afterward, suddenly, point ′C&#8242...

If I1, I2, I3 and I4 are the respective r.m.s. values of the time varying currents as shown in the four cases I, II, III and IV. Then identify the correct relations...

A bent rod PQR (PQ = QR = l) shown here is relating about its end P with angular speed ω in a region of transverse magnetic field of strength B....

A coil of resistance 400 Ω is placed in a magnetic field. If the magnetic flux φ (wb) linked with the coil varies with time t (sec) as φ = 50 t2 + 4, the current in the coil at t = 2 se...

A square current carrying loop is suspended in a uniform magnetic field acting in the plane of the loop. If the force on one arm of the loop is , the net force on the remaining three arms of the loop ...

A conducting square loop of side L and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B, constant in time and space pointing perpendi...

Two circular coils can be arranged in any of the three situations shown in the figure. Their mutual inductance will be...

A shorticircuited coil is placed in a time verying magnetic field. Electric power is disspated due to the current induced in the coul. If the number of turns were to be quadrupled (four times) and the...

In an AC generator, a coil with N turns, all of the same area A and total resistance R, rotates with frequency ω in a magnetic field B. The maximum value of emf generated in the coil is...

The figure shows certain wire segments joined together to form a coplanar loop. The loop is placed in a perpendicular magnetic field in the direction going into the plane of the figure. The magnitude ...

In a coil of self inductance of 5henry, the rate of change of current is 2 ampere per second, the e.m.f. induced in the coil is :

According to Lenz′s law there is a conversion of :

The coefficient of mutual inductance, where magnetic flux change by 2 × 10-2 Wb and current changes by 0.01 A is

Calculate current from battery just after switch is closed (t → 0) :-

The significance of self inductance L is the same as of that of ........ in the linear motion -

AB and CD are fixed conducting smooth rails placed in a vertical plane and joined by a constant current source at its upper end. PQ is a conducting rod which is free to slide on the rails. A horizonta...

A wire of fixed length is wound on a solenoid of length ′l′ and radius ′r′. Its self inductance is found to be L. Now if same wire is wound on a solenoid of length l/2 and radi...