Question

# State any two advantages of electromagnets over permanent magnets.

Hint: Strength of electromagnet is variable but strength of permanent magnet is constant.

Complete step by step solution:
The advantages of electromagnets over permanent magnets are mentioned as below
1. We can change the strength of the magnetic field of an electromagnet by varying current. We can either increase or decrease its strength. This is not possible in case of permanent magnets.
2. It is easier to manufacture electromagnet.
3. Magnetic power of electromagnets is more than compared to permanent magnets.

Where $1{\text{ }}gauss{\text{ }}\left( G \right) = {10^{ - 4}}tesla{\text{ }}\left( T \right)$