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Electromagnetic Induction Test - 79
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Electromagnetic Induction Test - 79
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  • Question 1/10
    4 / -1
    A hundred turns of insulated copper wire are wrapped around an iron cylinder of area 1 × 10–3 m1 and areconnected to a resistor. The total resistance in the circuit is 10 ohms. If the longitudinal magnetic induction in the iron changes from 1 weber m–2, in one direction to 1 weber m–2 in the opposite direction, how much charge flows through the circuit
    Solutions

  • Question 2/10
    4 / -1

    Solutions

  • Question 3/10
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    An aircraft with a wing-span of 40 m flies with a speed of 1080 km h–1 in the eastward direction at a constant altitude in the northern hemisphere, where the vertical component of earth\'s magnetic field is 1.75 × 10–5T.Then the e.m.f. that develops between the tips of the wings is
    Solutions

  • Question 4/10
    4 / -1

    Solutions

  • Question 5/10
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    In which of the following circuit is the current maximum just after the switch S is closed

    Solutions

  • Question 6/10
    4 / -1
    A small coil is introduced between the poles of an electromagnet so that its axis coincides with the magnetic field direction. The number of turns is n and the cross-sectional area of the coil is A. When the coil turns through 180° about its diameter, the charge flowing through the coil is Q. The total resistance of the circuit is R. What is the magnitude of the magnetic induction
    Solutions

  • Question 7/10
    4 / -1
    Two circular coils A and B are facing each other as shown in figure. When the current i through A is altered

  • Question 8/10
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    A conducting loop having a capacitor is moving outward from the magnetic field then which plate of the capacitor will be positive

  • Question 9/10
    4 / -1
    A straight wire of length L is bent into a semicircle. It is moved in a uniform magnetic field with speed v with diameter perpendicular to the field. The induced e.m.f.between the ends of the wire is

    Solutions

  • Question 10/10
    4 / -1

    Solutions

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