A 250-turn rectangular coil with a length of 2.1 cm and a width of 1.25 cm carries 85 \(\mu\)A and is subjected to a magnetic field with a strength of 0.85 T. What is the work done to rotate the coil by 180 degrees against the torque?

1. 9.1 μJ

2. 4.55 μJ

3. 2.3 μJ

4. 1.5 μJ

Subtopic:  Analogy between Electrostatics & Magnetostatics |
 57%
From NCERT
NEET - 2017
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A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in the equilibrium state. The energy required to rotate it by \(60^{\circ}\) is \(W\). Now the torque required to keep the magnet in this new position is:
1. \(\frac{W}{\sqrt{3}}\)
2. \(\sqrt{3}W\)
3. \(\frac{\sqrt{3}W}{2}\)
4. \(\frac{2W}{\sqrt{3}}\)

Subtopic:  Analogy between Electrostatics & Magnetostatics |
 77%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh