Long Answer Questions :
1. Write any four uses of electromagnet?
2. Define electric bell?
3. What are various components of an electric circuit?
4. What is electric fuse?
5. What is the lighting effect ofcurrent?
Answers
Explanation:
Ans 1) used in bullet train, used in cranes, used in
pulleys
Below are the uses of electromagnets.
The discovery of the electromagnet made possible the invention of electric motors and generators. Both of these work on a scientific principle called electromagnetic induction. This phenomenon was discovered by the scientist Michael Faraday. Electromagnets are used to control the switches in relay. This is important especially when it comes to things like making a telephone call. Only materials made of iron, nickel, cobalt or their alloys or naturally occurring minerals respond to a magnetic field. This has many practical uses. One use is sorting out metals. Since the elements mentioned are used a lot in manufacturing, using an electromagnet is an efficient way to sort these metals out.Used in lifting of massive objects. They are also used in transportation. Trains in Asia and Europe use electromagnets to levitate the cars. This helps them to move at phenomenal speeds.
An electric bell is a mechanical or electronic bell that functions by means of an electromagnet. ... When an electric current flows through the coils, the electromagnet creates a magnetic field which pulls the armature towards it, causing the hammer to strike the bell.