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Q.

When suspended freely, in which direction does the current-carrying solenoid orient itself?


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a

North-south

b

East-west

c

North-east

d

south-west 

answer is A.

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Detailed Solution

If a current-carrying solenoid is suspended freely, it will orient itself in the north-south direction.
The solenoid is a closed helical circular coil that acts like a magnet when current is run through it. A coil of wire serves as the solenoid, while soft iron is used to make the plunger. When an electric current flows through a coil, a magnetic field is created around the coil, which pulls the plunger in. Electrical energy is transformed into mechanical work by the solenoid.
 
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