What are the possible way(s) by which the strength of an electromagnet can be increased?
1. Decreasing the number of turns in the coil
2. Increasing the current in the coil
3. Using a plastic core inside the coil
4. Reversing the current direction in the coil

1 and 3 only

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1 and 2 only

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2 and 4 only

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2 only

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Solution

The correct option is D 2 only
The strength of an electromagnet can be increased by increasing the current in the coil, increasing the number of turns in the coil and by inserting a soft iron core inside the coil.
Reversing the direction of current in the coil will only change the direction of the magnetic field.
Hence, only statement 2 is correct.

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Similar questions

Q. Yash made his own electromagnet but he found that it is not sufficiently strong. So, what are the possible way(s) that he should use to make the electromagnet strong?
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(ii) Increase the current in the coil.
(iii) Use a plastic core inside the coil.
(iv) Reverse the current direction in the coil.

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What are the possible way(s) by which the strength of an electromagnet can be increased? 1. Decreasing the number of turns in the coil 2. Increasing the current in the coil 3. Using a plastic core inside the coil​ 4. Reversing the current direction in the coil

What are the possible way(s) by which the strength of an electromagnet can be increased?
1. Decreasing the number of turns in the coil
2. Increasing the current in the coil
3. Using a plastic core inside the coil
4. Reversing the current direction in the coil