Exams › NEET › Physics

A conducting square frame of side ‘a’ and a long straight wire carrying current I are located in the same plane as shown in the figure. The frame moves to the right with a constant velocity ‘V’. The emf induced in the frame will be proportional to

1. 1 / (2x - a)^2
2. 1 / (2x + a)^2
3. 1 / (2x - a)(2x + a)
4. 1 / x^2

Correct answer: 1 / (2x - a)(2x + a)

Solution

The emf induced in the square frame is due to the change in magnetic flux caused by the current in the straight wire. The magnetic field of the wire varies inversely with distance, and the emf depends on the difference in flux through the two sides of the frame. This leads to the proportionality 1 / (2x - a)(2x + a).

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 →