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The strength of the magnetic field between the poles of an electromagnet would be unchanged if: a) current in the electromagnet winding were doubled b) direction of current in electromagnet were reversed c) distance between the poles of electromagnet were doubled d) material of the core of electromagnet were changed
The strength of the magnetic field between the poles of an electromagnet would be unchanged if: a) current in the electromagnet winding were doubled b) direction of current in electromagnet were reversed c) distance between the poles of electromagnet were doubled d) material of the core of electromagnet were changed
CBSE | Class 10 | Lakhmir Singh | Magnetic Effects of Electric Current | Physics
The strength of the magnetic field between the poles of an electromagnet would be unchanged if: a) current in the electromagnet winding were doubled b) direction of current in electromagnet were reversed c) distance between the poles of electromagnet were doubled d) material of the core of electromagnet were changed

Answer:

The correct option is b) direction of current in electromagnet were reversed.

Answer:

The electromagnetic winding’s current direction is reversed only on one side of the pole. The magnetic field strength remains unchanged when the current is reversed.

 

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