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Electromagnetic...

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  • Question 1
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    electromagnetic induction i.e currents can be induced in coils (Select the best)

  • Question 2
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    Damping in galvanometers is based oUpdate Questionn

  • Question 3
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    Predict the polarity of the capacitor in the situation described by fig.

  • Question 4
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    A circular coil of radius 8.0 cm and 20 turns is rotated about its vertical diameter with an angular speed of 50 rad  s-1  in a uniform horizontal magnetic field of magnitude  3 ×10-2   T. If the coil resistance is  10 Ω, maximum emf induced in the coil,maximum value of current in the coil and average power loss due to Joule heating are

  • Question 5
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    An ac generator consists of 8 turns of wire, each of area  A=0.0900m2  , and the total resistance of the wire is  12.0 Ω. The loop rotates in a 0.500-T magnetic field at a constant frequency of 60.0 Hz. Maximum induced emf is

  • Question 6
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    When a bar magnet is pushed towards the coil connected in series with a galvanometer, the pointer in the galvanometer G

  • Question 7
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    There are two stationary coils near each other. If current in coil-1 is changing with time, relationship of current in coil-2 to it 's emf is described by

  • Question 8
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    A metallic rod of 1 m length is rotated with a frequency of 50 rev/s about an axis passing through the centre point O. Other end of the metallic rod slides on a Metallic ring . A constant and uniform magnetic field of 2 T parallel to the axis is present everywhere. What is the emf between the centre and the metallic ring?

  • Question 9
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    Coils  C1  and  C2  are stationary. C1  connected in series with a galvanometer while  C2  is connected to a battery through a tapping key. If the tapping key is pressed and released the galvaometer

  • Question 10
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    An AC generator consists of

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