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The magnetic field strength of an electromagnet is therefore determined by the ampere turns of the coil with the more turns of wire in the coil the greater will be the strength of the magnetic field.
What Is Electromagnetic Radiation? There are electric fields that develop through variances in voltage, and there are magnetic fields that develop from the flow of electric current. The higher the electric field or the greater the magnetic field, the stronger the electromagnetic radiation. You can have an electric fields without a current; however, if there is a current, the magnetic field will vary in how much power it uses, whereas the electric field will be constant.