Chapter 4: Magnetic Effects of Electric Current

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Q
Magnetic Effects of Electric Current

Question:

How does a solenoid behave like a magnet? Can you determine the north and south poles of a current-carrying solenoid with the help of a bar magnet? Explain.

Answer:

A solenoid behaves like a magnet in the following ways:

1) The magnetic field produced by a current-carrying solenoid is very much similar to that of a bar magnet.

2) Like a bar magnet, one end of the solenoid has N-polarity while the other end has S-polarity.

To determine the north and south poles, we bring N-pole of the bar magnet near one end of the solenoid. If there is an attraction, then that end of the solenoid has south polarity and the other has north polarity. If there is repulsion, then that end of the solenoid has a north polarity and the other end has south polarity because similar poles repel each other.


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