Exams › NEET › Physics

The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA. This inductor is of inductance

1. 0.138 H
2. 138.88 H
3. 13.89 H
4. 1.389 H

Correct answer: 0.138 H

Solution

The magnetic potential energy stored in an inductor is given by the formula U = (1/2)LI². Rearranging for L, we get L = 2U/I². Substituting U = 25 × 10⁻³ J and I = 60 × 10⁻³ A, we find L = 2 × (25 × 10⁻³) / (60 × 10⁻³)² = 0.138 H.

Related NEET Physics questions

• Which of the following statement regarding transformer is incorrect?
• Which one of the following statements is true?
• Which statement is incorrect related to induced electric field due to changing magnetic flux?
• A dynamo produces an electric current. It is based on the principle:
• In electromagnetic induction, the induced E.M.F is independent of
• A conductor is moved in a varying magnetic field. Name the law which determines the direction of current induced in the conductor:

⚔️ Practice NEET Physics free + battle 1v1 →