Question

What are the 3 factors which determines induced emf strength?

Answer 1

The strength of the induced electromotive force (emf) in a conductor depends on the following three factors:

1. **Magnetic Field Strength (B):**
   The stronger the magnetic field, the greater the induced emf. According to Faraday’s Law of Induction, the induced emf is directly proportional to the rate of change of the magnetic field through a loop or coil.

2. **Rate of Change of Magnetic Flux (dΦ/dt):**
   The induced emf is stronger when the magnetic flux through the conductor changes more quickly. This can happen by either changing the magnetic field or moving the conductor through the magnetic field. The faster the change in the magnetic flux, the higher the induced emf.

3. **Number of Turns in the Coil (N):**
   In a coil of wire, the induced emf is proportional to the number of turns in the coil. More turns mean more loops for the magnetic flux to pass through, resulting in a higher induced emf.

These three factors combine to determine the total induced emf in a conductor or coil.