How can the strength of the magnetic field of a solenoid can be increased by i. increasing the number of turns of the coil of the solenoid. ii. decreasing the amount of current flowing through the solenoid. iii. decreasing the number of turns of the coil of the solenoid. iv. replacing the iron core with ceramic.
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i. is the answer
Explanation:
where is the number of turns per unit length in the solenoid
is the current through the wire
Hence increasing current or number of loops per meter would increase the magnetic field in solenoid.
The iron core being a magnet itself is magnetized hence it contributes flux to the solenoid's flux, hence the magnetic field strength.
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