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 $\mu J$

2. 4.55 $\mu J$

3. 2.3 $\mu$$J$

4. 1.5 $\mu J$

Subtopic:  Analogy between Electrostatics & Magnetostatics |
57%
From NCERT
NEET - 2017
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

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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