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qUESTIONS

MCQs-PYQs-12th-jee

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

MCQs-PYQs-12th-jee

A straight conductor 0.1 m long moves in a uniform magnetic field 0.1 T. The velocity of the conductor is 15 m/s and is directed perpendicular to the field. The m.f. induced between the two ends of the conductor is

MCQs-PYQs-12th-jee

The inductance of a solenoid 0.5 m long of cross-sectional area 20 cm2 and with 500 turns is

MCQs-PYQs-12th-jee

A conducting rod PQ of length L = 1.0 m is moving with a

MCQs-PYQs-12th-jee

When the current through a solenoid increases at a constant rate, the induced current

MCQs-PYQs-12th-jee

Two identical induction coils each of inductance L joined in series are placed very close to each other such that the winding direction of one is exactly opposite to that of the other. What is the net inductance

MCQs-PYQs-12th-jee

A circular coil of radius 5 cm has 500 turns of a wire. The approximate value of the coefficient of self induction of the coil will be

MCQs-PYQs-12th-jee

The inductance of a closed-packed coil of 400 turns is 8 mH. A current of 5 mA is passed through it. The magnetic flux through each turn of the coil is

Three solenoid coils of same dimension, same number of turns and same number of layers of windings are taken. Coil 1 with inductance L was wound using a Mn wire of resistance 11Ω/m, coil 2 with inductance L was wound using the similar wire but the direction of winding was reversed in each layer; coil 3 with inductance L was wound using a superconducting wire. The self inductance of the coils L1,L2,L3 are

MCQs-PYQs-12th-jee

The equivalent inductance of two inductances is 2.4 henry when connected in parallel and 10 henry when connected in series. The difference between the two inductances is

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