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10 January, 21:20

The electromagnet shown below is made up of a coil of electrical wire wrapped around an iron core.

Which of the following would decrease the strength of this electromagnet?

A adding batteries to the circuit

B removing its iron core

C increasing the current through the coil

D increasing the number of wire loops in the coil

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Answers (1)
  1. 11 January, 00:40
    0
    B. Removing its iron core

    Explanation:

    In an electromagnet role of its core is very important as it concentrate magnetic flux to make magnetic field more powerful. Generally core of electromagnet is made up of a ferromagnetic material or of a ferrimagnetic material such as iron. Adding batteries to the circuit and increasing the current through the coil and increasing loops in the coil will increase magnetic strength of an electromagnet.
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