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  • Question 1
    4 / -1

    A and B are two infinitely long straight parallel conductors. C is another straight conductor of length lm kept parallel to A and B as shown in the figure. Then the force experienced by C is

  • Question 2
    4 / -1

    A wire PQR is bent as shown in figure and is placed in a region of uniform magnetic field B. The length of PQ = QR = l. A current I ampere flows through the wire as shown. The magnitude of the force on PQ and QR will be

  • Question 3
    4 / -1

    Two long conductors, separated by a distance d carry currents I1 and I2 in the same direction. They exert a force F on each other. Now the current in one of them is increased to two times and its direction is reversed. The distance is also increased to 3 d. The new value of the force between them is

  • Question 4
    4 / -1

    Three long straight wires A, B and C are carrying currents as shown in figure. Then the resultant force on B is directed

  • Question 5
    4 / -1

    Two thin, long, parallel wires, separated by a distance d carry a current of i ampere in the same direction. They will

  • Question 6
    4 / -1

    A circular coil of 20 turns and radius 10 cm is placed in uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in coil is 5 A, then the torque acting on the coil will be

  • Question 7
    4 / -1

    A vertical straight conductor carries a current vertically upwards. A point P lies to the east of it at a small distance and another point Q lies to the west at the same distance. The magnetic field at P is

  • Question 8
    4 / -1

    In the fig. shown the magnetic field induction at the centre O of the arc due to current in portion CD will be

  • Question 9
    4 / -1

    In the fig. shown, there are two semicircles of radii r1 and r2 in which a current I is flowing. The magnetic field induction at the centre O will be

  • Question 10
    4 / -1

    A current I flows along the length of an infinity long straight thin walled pipe. Then

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