The figure shows a circuit containing a coil wound over a long and hollow thin tube. Mention two methods to increase the strength of the magnetic field inside the coil.

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Solution

The magnetic field inside a current carrying solenoid is given by
$B = μ_{0} n I$
where $n$ is the number of turns per unit length in the solenoid
$I$ is the current through the wire
Hence to increase the magnetic field, the current could be increase or the number of turns in solenoid would have to be increased.

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The figure shows a circuit containing a coil wound over a long and hollow thin tube. Mention two methods to increase the strength of the magnetic field inside the coil.

The magnetic field inside a current carrying solenoid is given by B=μ0nIwhere n is the number of turns per unit length in the solenoidI is the current through the wireHence to increase the magnetic field, the current could be increase or the number of turns in solenoid would have to be increased.