GEOLOGY

Detailed explanation-1: -Answer. There is a direct relationship between the magnitude of the electric current creating a magnetic field and the magnitude of the field itself. We can say therefore that the larger the current, the stronger the field, and the smaller the current, the weaker the field.

Detailed explanation-2: -As we can see from the relation magnetic field is directly proportional to the current value, so decreasing the current value will decrease the magnetic field also.

Detailed explanation-3: -As the electric current through a wire decreases, the magnetic field around the wire becomes stronger. As the electric current through a wire increases, the magnetic field around the wire becomes weaker. As the electric current through a wire increases, the magnetic field around the wire becomes stronger.

Detailed explanation-4: -Thus, using fewer loops of wire per meter in the coil, decreasing the current in the wire and removing the iron core will decrease the strength of the magnetic field of an electromagnet.

Detailed explanation-5: -The strength of magnetic field is always proportional to the magnitude of current flowing. Hence, when the current increases, the magnetic field also increases.