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Electromagnetic Induction Test - 80
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Electromagnetic Induction Test - 80
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  • Question 1/10
    4 / -1
    The magnetic field in the cylindrical region shown in figure increases at a constant rate of 20 mT/sec. Each side of the square loop ABCD has a length of 1 cm and resistance of 4 Ω. Find the current in the wire AB if the switch S is closed

    Solutions

  • Question 2/10
    4 / -1
    Two coils P and Q are placed co-axially and carry current I and I\' respectively

    Solutions

  • Question 3/10
    4 / -1
    A pair of parallel conducting rails lie at right angles to a uniform magnetic field of 2.0 T as shown in the fig. Two resistors 10 Ω and 5 Ω are to slide without friction along the rail. The distance between the conducting rails is 0.1 m. Then

    Solutions

  • Question 4/10
    4 / -1
    The current through a coil of self-inductance L = 2 mH is given by I = t2e–t at time t. How long it will take tomake the e.m.f. zero
    Solutions

  • Question 5/10
    4 / -1
    A conducting wire sits on smooth metal rails, as shown in figure. A variable magnetic field points out of the page. The strength of this magnetic field is increased linearly from zero. Immediately after the field starts to increase, what will be the direction of the current in the wire and the direction of the wire's motion ?

    Solutions

  • Question 6/10
    4 / -1
    A rectangular loop has a sliding connector PQ of length l and resistance R Ω and it is moving with a speed v as shown in the figure. The set up is placed in an uniform magnetic field going into the plane of the paper. The three currents I1 , I2 , I are

    Solutions

  • Question 7/10
    4 / -1
    A rectangular loop of length 1 and breadth b is placed at distance of x from infinitely long wire carrying current i such that the direction of current is parallel to breadth. If the loop moves away from the current wire in a direction perpendicular to it with a velocity v, the magnitude of the emf in the loop is ( μ0 = permeability of free space)
    Solutions

  • Question 8/10
    4 / -1
    One conducting U-tube can slide inside another as shown in figure, maintaining electrical contacts between the tubes. The magnetic field B is perpendicular to the plane of the figure. If each tube moves towards the other at a constant speed v, then the emf induced in the circuit in terms of B, l and v, where l is the width of each tube, will be

    Solutions

  • Question 9/10
    4 / -1

    Solutions

  • Question 10/10
    4 / -1
    According to phenomenon of mutual inductance,
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