# The equation where ef is the emf and φ is the flux linkage in a single-turn coil, can best represent

_{f}is the emf and φ is the flux linkage in a single-turn coil, can best represent

### Right Answer is:

Faraday’s Law and Lenz Law

#### SOLUTION

**Faraday’s 1st laws of electromagnetic induction** tell us about the condition under which an e.m.f. is induced in a conductor or coil when the magnetic flux linking a conductor or coil changes.

**Faraday’s 2nd laws of electromagnetic induction** give the magnitude of the induced e.m.f in a conductor or coil and may be stated as:

The magnitude of the e.mf induced in a conductor or coil is directly proportional to the rate of change of magnetic flux linkages.

Suppose a coil has N turns and magnetic flux linking the coil increases (i.e. changes) from φ_{1} Wb to φ_{2} Wb in t seconds. Now, magnetic flux linkages mean the product of magnetic flux and the number of turns of the coil.

**N = e dφ/dt**

**Lenz Law:- **Lenz’s law states: the direction of the induced e.m.f. is such as to oppose the change producing it. Therefore, the magnitude and direction of induced e.m.f. should be written as :

**N = −e dφ/dt**