Chapter 13 Magnetic Effects of Electric Current – Page 4 – HI MCQ!

Which colour wire is used for earthing?

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How many magnetic poles are there in a current carrying solenoid?

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The front face of a circular wire carrying current behaves like a north pole. The direction of current in this face of the circular wire is?

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Read the following sentences carefully, and choose the correct one?

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If a wire (in the form of a coil) is kept fixed, but a magnet is moved inside it, even then a current is produced in the coil of wire.
A generator uses the movement or rotation of a rectangular coil of wire between the poles of a horseshoe magnet to produce an electric current.
The direction of induced current can also be reversed by reversing the direction of magnetic field.
All the above.

Switches are connected to?

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What is that instrument which can detect the presence of electric current in a circuit?

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A.C generator works on the principle of?

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A current through a horizontal power line flows from south to North direction. The direction of magnetic field line 0.5m above it is?

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The condition for the praenomen of electromagnetic induction is that there must be a relative motion between?

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If the key in the given arrangement is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane ABCD, the lines are?

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