Question:
How does an electromagnet differ from a permanent magnet?
How does an electromagnet differ from a permanent magnet?
Show Hint
Unlike permanent magnets, electromagnets can be switched on or off and have adjustable strength.
Updated On: Nov 5, 2025
Hide Solution
Verified By Collegedunia
Solution and Explanation
An electromagnet produces a magnetic field only when an electric current flows through it, whereas a permanent magnet retains its magnetism indefinitely. Additionally, the strength of an electromagnet can be controlled, but a permanent magnet has a fixed strength.
Was this answer helpful?
0
0
Top Questions on Magnetism
- Magnetic moment of a bivalent ion in aqueous solution will be, if its atomic number is 25:
- What is value of B called, when H = 0 is in the hysteresis loop?
- What is Curie temperature?
- Establish the formula of magnetic dipole moment.
- What is Ferromagnetism? Explain it on the basis of domain theory.
View More Questions
Questions Asked in UP Board X exam
- Colour origin from
- UP Board X - 2025
- Light and Colour
- How many national political parties are there in India?
- UP Board X - 2025
- Parties and the Party Systems in India
- Prime factorisation of 156 will be:
- UP Board X - 2025
- Number System
- (i) Food chain
(ii) Growth hormone in human.- UP Board X - 2025
- Food Chains and Energy Flow
- A lemon placed in a beaker full of water appears larger than its real size, when viewed sideways. The light phenomenon responsible is -
- UP Board X - 2025
- Refraction of Light
View More Questions