Advertisements
Advertisements
Question
Which substances are used for making electromagnets?
Advertisements
Solution
To make an electromagnet, we require the following:
- A long conducting copper wire
- An iron nail on which the copper wire has to be wound
- A switch
- A battery
RELATED QUESTIONS
The magnetic field inside a long straight solenoid carrying current ______.
A thick wire is hanging form a wooden table. An anticlockwise magnetic field is to be produced around the wire by passing current through this wire by using a battery. Which terminal of the battery should be connected to the:
(a) top end of wire?
(b) bottom end of wire?
Give reason for your choice.
If you hold a coil of wire next to a magnet, no current will flow in the coil. What else is needed to induce a current?
Draw magnetic field lines produced around a current-carrying straight conductor passing through cardboard. Name, state and apply the rule to mark the direction of these field lines.
Select the correct option:
A bar magnet is rubbed on a bar of steel along its length 20 times. The bar of steel gets magnetised due to the process of:
Repulsion is a surer test of magnetic condition of a body than attraction. Explain.
Distinguish between
Magnetic properties of iron and steel.
Inside the magnet, the field lines moves ____________.
The magnetic field lines always begin from ____________.
The magnetic field lines are stronger near the ______ and it diminishes as you go away from it.
