- #1

harsh22902

- 14

- 2

- Homework Statement
- In the adjacent figure, the mutual inductance of the infinite straight wire and the

coil is M, while the self inductance of the coil is L. The current in infinite wire is

varying according to the relation I = at, where "a" is a constant and t is the time.

The time dependence of current in the coil is .

- Relevant Equations
- flux = L*i

flux due to a coupled coil = M* current through that coil

In the given question they have not provided the dimensions of the coil so I assumed it to be very close to the wire and having negligible dimensions compared to the wire . Then EMF induced in the coil due to the current in the wire comes out as M*a . Which when divided by resistance gives option a . But the correct answer is option D. Also the initial change in flux is due to current in the wire so I did not consider self inductance.

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