Question

The strength of a current carrying solenoid increases with a rise in its temperature.

• A. True
• B. False

Answer 1

The correct option is B

False

Heating (increasing temperature) has no effect on the strength of a magnetic field produced by current flowing in a coil of wire. The strength of that magnetic field is the product of the ampere-turns of current going around the electromagnet. Although heating permanent magnets do demagnetize them but have almost no influence on electromagnets. Hence rise in temperature will not increase the magnetic field strength of a solenoid.