Exams › NEET › Physics

Two conducting loops of radii R_1 and R_2 are concentric and lie in the same plane. If R_1 bb R_2 , the mutual inductance M between them will be directly proportional to

1. R_1 R_2
2. R_2/R_1
3. R_2^2/R_1
4. R_2^2 R_1

Correct answer: R_2^2/R_1

Solution

When R_1 bb R_2 , the magnetic field due to the larger loop is nearly uniform over the smaller loop. The field at the center of a circular loop is proportional to 1/R_1 , and the flux through the smaller loop is proportional to its area ( R_2^2 ) . Hence M propto R_2^2/R_1 .

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 →