Physics
How is an electromagnet made? Name two factors on which the strength of the magnetic field of an electromagnet depends.
Magnetism
88 Likes
Answer
An electromagnet can be made in the following two shapes:
- I-shape or bar magnet.
- U-shape or horse-shoe magnet.
The principle behind making both the magnets is the same. An electromagnet can be made by winding an insulated copper wire over a piece of soft iron in U-shape or a solenoid.
The factors on which the strength of the magnetic field of an electromagnet depends are —
- The number of turns of wire wound around the coil — By increasing the number of turns of wire wound around the coil, the magnetic field of an electromagnet can be increased.
- The amount of current flowing through the wire — By increasing the current through the wire, the magnetic field of an electromagnet can be increased.
Answered By
56 Likes
Related Questions
How is the working of an electric bell affected, if alternating current is used instead of direct current?
Name the material used for making the armature of an electric bell. Give a reason for your answer.
You are required to make an electromagnet from a soft iron bar by using a cell, an insulated coil of copper wire and a switch. (a) Draw a circuit diagram to represent the process. (b) Label the poles of the electromagnet.
State two differences between an electromagnet and a permanent magnet.