A magnet is being inserted into a coil of wire. On which of the following factors does the induced e.m.f in the coil depend? I. Number of turns in the coil ...

Answer Details

The induced electromotive force (e.m.f) in a coil of wire depends on the rate of change of magnetic flux through the coil. The magnetic flux is directly proportional to the strength of the magnet and the speed at which it is inserted into the coil. Therefore, option III is correct. The induced e.m.f also depends on the number of turns in the coil, which determines the amount of magnetic flux linking the coil. Additionally, the strength of the coil is also a factor since a stronger coil can produce a stronger magnetic field and, hence, a larger magnetic flux. Therefore, options I and II are also correct. Thus, the answer is option V - I, II, and III only.