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Electromagnetic...

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  • Question 1
    4 / -1

    In the following figure, the magnet is moved towards the coil with a speed v and induced e.m.f. If magnet and coil recede away from one another each moving with speed v, the induced e.m.f. in the coil will be

  • Question 2
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    A current carrying solenoid is approaching a conducting loop as shown in the figure. The direction of induced current as observed by an observer on the other side of the loop will be

  • Question 3
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    A conducting wire frame is placed in a magnetic field which is directed into the paper. The magnetic field is increasing at a constant rate. The directions of induced current in wires AB and CD are

  • Question 4
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    A square metallic wire loop of side 0.1 m and resistance of 1 Ω is moved with a constant velocity in a magnetic field of 2 wb/m2 as shown in figure. The magnetic field is perpendicular to the plane of the loop, loop is connected to a network of resistances. What should be the velocity of loop so as to have a steady current of lmA in loop

  • Question 5
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    A conductor ABOCD moves along its bisector with a velocity of 1 m/s through a perpendicular magnetic field of 1 wb/m2, as shown in fig. If all the four sides are of lm length each, then the induced e.m.f. between points A and D is

  • Question 6
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    A conducting rod PQ of length L = 1.0 m is moving with a uniform speed v = 2 m/s in a uniform magnetic field B = 4.0T directed into the paper. A capacitor of capacity C = 10 µF is connected as shown in figure. Then

  • Question 7
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    The resistance in the following circuit is increased at a particular instant. At this instant the value of resistance is 10 Ω. The current in the circuit will be

  • Question 8
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    Shown in the figure is a circular loop of radius r and resistance R. A variable magnetic field of induction B = B0 e–t is established inside to coil. If the key (K) is closed, the electrical power developed right after closing the switch is equal to

  • Question 9
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    A conducting ring is placed around the core of an electromagnet as shown in fig. When key K is pressed, the ring

  • Question 10
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    The north and south poles of two identical magnets approach a coil, containing a condenser, with equal speeds from opposite sides. Then

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