NEET Physics Bar Magnet Match the Following Question
Match Column-I with Column-II.
| Column-I | Column-II |
|---|---|
| (a) Torque on a bar magnet | (i) m × B |
| (b) Potential energy of a magnet | (ii) –m . B |
| (c) Magnetic moment of a solenoid | (iii) n(2l)I(πa²) |
| (d) Null point location | (iv) Equal and opposite to Earth's field |
a-i, b-ii, c-iii, d-iv
a-ii, b-i, c-iv, d-iii
a-iv, b-iii, c-ii, d-i
a-iii, b-iv, c-i, d-ii
Correct Answer
Detailed Explanation
The torque on a bar magnet in a magnetic field is given by the expression m × B, while the potential energy is given by –m . B. The magnetic moment of a solenoid is defined as n(2l)I(πa²), and the null point is located where the magnetic field due to the magnet is equal and opposite to the Earth's magnetic field.
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