Question

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

Answer 1

Answer:

increasing temperature of solenoid

Answer 2

The strength of the magnetic field of a current carrying solenoid decreases on increasing temperature of solenoid.

Explanation:

The strength of the magnetic field of a current carrying solenoid is given by the below formula as :

$B=\mu_onI$

Where

n is the number of turns per unit length

I is the current flowing through solenoid

Magnetism also depends on the temperature of solenoid. There is an inverse relation between magnetic field and the temperature. At higher temperature, random atomic movement and misalignment of magnetic domains increases. As a result, magnetism decreases at higher temperature.

Out of given options, the strength of the magnetic field of a current carrying solenoid decreases on increasing temperature of solenoid.

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Magnetic field

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