Which of the following measures will decrease the strength of the magnetic field of a current carrying solenoid
1. increasing temperature of solenoid
2. increase the current
3 increase the number of turns of wire
4. all the above measures
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Answer:
1. increasing temperature of the solenoid
Explanation:
A solenoid is usually made up of iron. The resistance of iron increases with an increase in it's temperature. The increase in resistance will decrease the flow of current through the solenoid due to which the strength of its magnetic field decreases.
On the other hand increasing the current and the number of wires of the solenoid increases the magnetic field strength of the solenoid.
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