Name the train that makes use of electromagnets for propulsion. (Electromagnetic train/electric train)

Write the uses of a magnet.

Which magnet will you use when the iron is to be separated from trash?

A soft-iron rod and a steel rod each have coils around them. Both rods are initially un-magnetised. The coils are attracted to circuits, as shown in the second diagram.

Which of the two arrangement would be used as the electromagnet on the crane in a scrap metal yard?

Choose the odd one and give reason:

How will you make levitating propeller?

Write any two uses of magnet.

Describe a method by which you could directly measure the strength of an electromagnet's field by measuring the force produced by it and compare the strengths of different electromagnets. You should note the factors that affect the strength of the field and how you would vary them?