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प्रश्न
Which substances are used for making electromagnets?
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उत्तर
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
संबंधित प्रश्न
Copy the figure below which shows a plotting compass and a magnet. Label the N pole of the magnet and draw field line on which the compass lines
A current flows downwards in a wire that passes vertically through a table top. Will the magnetic field lines around it go clockwise or anticlockwise when viewed from above the table?
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?
What is an artificial magnet? State two reasons why do we need artificial magnets .
State four properties of magnetic field lines.
Select the correct option:
The magnetic strength of a bar magnet is:
State briefly the modern views on magnetism.
Complete the following diagram of magnets to show the lines of force.
Inside the magnet, the field lines moves ____________.
State the inference drawn about the direction of the magnetic field lines on the basis of the following diagrams.
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| Figure 'a' | Figure 'b' |
