Question

Strength of magnetic field of solenoid can be increased by adding core made of:

• A. Copper
• B. Ferrous
• C. Silver
• D. Aluminium

Answer 1

The correct option is B Ferrous

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.Soft" magnetic materials with low coercivity and hysteresis, such as silicon steel, or ferrite, are usually used in cores.

Strength of magnetic field of solenoid can be increased by adding core made of ferrous.