How can the magnetic field strength of an electromagnet be reduced?
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The strength of magnetic field produced by an electromagnet can be reduced by the following methods:
=> By decreasing the electro motive force (emf) of the cell, hence decreasing the amount of current flowing through the coil.
=> By decreasing the number of turns, hence decreasing the surface area of the coil.
=> By removing the soft iron bar, if any, inserted within the coil.
These are the methods.
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