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G shows deflection to the left and right with constant amplitude
G shows deflection on one side
G shows no deflection.
G shows deflection to the left and right but the amplitude steadily decreases
A square coil area is placed perpendicular to a uniform magnetic field of intensity. The magnetic flux through the coil is ____.
10 weber
100 weber
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A coil of area has 500 turns. Magnetic field of is perpendicular to the coil. The field is reduced to zero in 0.1 second. The induced e.m.f. in the coil is ____.
1 V
5 V
50 V
Zero
Two different loops are concentric and lie in the same plane. The current in the outer loop is clockwise and increasing with time. The induced current in the inner loop then, is ____.
Clockwise
Zero
Counter clockwise
In a direction that depends on the ratio of the loop radii
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 wills ____.
Keep oscillating with the old time period
Keep oscillating with a smaller time period
Keep oscillating with a larger time period
Come to rest very soon
A circular coil of 500 turns of wire has an enclosed area of per turn. It is kept perpendicular to a magnetic field of induction 0.2 T and rotated by 180° about a diameter perpendicular to the field in 0.1 sec. How much charge will pass when the coil is connected to a galvanometer with a combined resistance of 50 ohms?
0.2 C
0.4 C
2 C
4 C
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 ____.
2.5 ( 10–7 weber
6.31 ( 10–6 weber
5.2 ( 10–5 weber
4.1 ( 10–5 weber
A coil of 40 (resistances 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 ( C charge flows through it. The intensity of magnetic field is ____.
6.55 T
5.66 T
0.655 T
0.566 T
A rectangular coil of 20 turns and area of cross- section 25 sq cm has a resistance of 100 ohm. If a magnetic field which is perpendicular to the plane of the coil changes at the rate of 1000 Tesla per second, the current in the coil is ____.
1.0 ampere
50 ampere
0.5 ampere
5.0 ampere