Physics 2016 JAMB Past Questions - Question 2: The electromotive force in the secondary winding is

Correct Answer

C

Explanation

The electromotive force (EMF) in the secondary winding of a transformer depends on various factors such as the number of turns in the secondary winding, the magnetic flux induced by the primary winding, and the frequency of the alternating current.  
The electromotive force (emf) in the secondary winding of a transformer depends on various factors, including the number of turns in the secondary coil, the rate of change of magnetic flux in the core, and the turns ratio between the primary and secondary windings.

The emf in the secondary winding can be calculated using the following formula:

E_secondary = E_primary * (N_secondary / N_primary)

Where:
- E_secondary is the electromotive force (emf) in the secondary winding.
- E_primary is the emf in the primary winding.
- N_secondary is the number of turns in the secondary winding.
- N_primary is the number of turns in the primary winding.

The emf in the secondary winding is proportional to the emf in the primary winding, and the proportionality is determined by the turns ratio, which is the ratio of the number of turns in the secondary winding to the number of turns in the primary winding.

It's important to note that this formula assumes ideal conditions and doesn't take into account losses or other factors that can affect the actual voltage output in a real transformer.