Question

What are the 3 factors which determines induced emf strength?

Answer 1

The strength of the induced electromotive force (emf) in a conductor is determined by three main factors:

1. Magnetic Field Strength (B):  
   

   The stronger the magnetic field, the greater the induced emf. According to Faraday’s Law, the induced emf is directly proportional to the strength of the magnetic field that is interacting with the conductor.

1. Speed of Movement (v):  
   

   The faster the conductor moves through the magnetic field, the higher the induced emf. If the conductor moves quickly, the rate of change of the magnetic flux through the conductor increases, generating a stronger emf.

1. Number of Loops (N):  
   

   If there are more loops or turns of wire in the coil, the induced emf is stronger. This is because each loop of wire contributes to the total induced emf, so having more turns results in a greater total emf.

In simple terms, the induced emf depends on how strong the magnetic field is, how fast the conductor is moving through it, and how many loops of wire are involved.