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प्रश्न
What is a solenoid? Draw a sketch to show the magnetic field pattern produced by a current-carrying solenoid.
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उत्तर
Solenoid:
A solenoid is a long coil that contains large number of close turns of insulated copper wire.
The magnetic field pattern produced by a current-carrying solenoid is similar to the magnetic field produced by a bar magnet.

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