Advertisements
Advertisements
Question
Name one device that uses an electromagnet.
Advertisements
Solution
The electromagnet is used in an electric relay.
APPEARS IN
RELATED QUESTIONS
Electromagnets are made up of :
Name the material used for preparing an electromagnet.
How is an electromagnet made? Name two factors on which the strength of magnetic field of the electromagnet depends.
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.
- Draw a circuit diagram to represent the process.
- Label the poles of the electromagnet.
State two ways through which the strength of an electromagnet can be increased.
State two advantages of an electromagnet over a permanent magnet.
State two differences between an electromagnet and a permanent magnet.
What is an electroscope? Describe the different stages of charging a gold leaf electroscope negatively with the help of a diagram.
Assertion (A): When 2 long parallel wires, hanging freely are connected in parallel to a battery, they come closer to each other.
Reason (R): Wires carrying current in opposite directions repel each other.
Explain the working of the following device.
Speaker
