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Question
Which magnet will you use?
Iron is to be separated from trash.
Solution
Electromagnet can be used to separate iron from trash.
RELATED QUESTIONS
Show with the aid of a diagram how a wire is wound on a U-shaped piece of soft iron in order to make it an electromagnet. Complete the circuit diagram and label the poles of the electromagnet.
Name two factors on which the strength of magnetic field of an electromagnet depends and state how does it depend on the factors stated by you.
State three uses of an electromagnet?
Name the material used for making the armature of an electric bell. Give a reason for your answer.
What is an electromagnet?
State the purpose of the iron core.
How does a magnetic field set up by a solenoid change when a soft iron core is inserted inside solenoid?
Point out three differences between an electromagnet and a bar (or permanent) magnet.
(i) A straight wire conductor passes vertically through a piece of cardboard sprinkled with iron filings. Copy the diagram and show the setting of iron filings when a current is passed through the wire in the upward direction and the cardboard is tapped gently. Draw arrows to represent the direction of the magnetic field lines.
(ii) Name the law which helped you to find the direction of the magnetic field lines.
Write the answer in your word.
How is an electromagnet made?
