What is an electromagnet? Give three uses of electromagnets.

Define the following:

Solenoid

Name an electromagnetic device used for lifting heavy loads.

(Choose from electromagnetic crane or electric motor)

Define the following:

Electromagnet 

Name the effect of an electric current used in each of the following devices or situations:

Speaker producing sounds.

Write the odd-one-out giving reason.

Heating effect of current, Bulb, Toaster, Electric iron, Electromagnet, Nichrome wire.

Which one is a stronger magnet among the Fig. (i) and (ii) and why?