Correct Answer - Option 4 :
\(\frac{{\varphi ZN}}{{60}}V\)
Concept:
e.m.f. generated by a generator is
\(E = \frac{{\phi ZNP}}{{60A}}\)
Where,
ϕ = flux
Z = number of conductors
N = number of turns
P = number of poles
A = number of parallel paths
lap winding, number of parallel paths (A) = number of poles (P)
Explanation:
\(E = \frac{{\phi ZNP}}{{60A}}\) ...1
For lap winding:
A = P
Put A = P in equation 1
\(E = \frac{{\phi ZN}}{{60}}\)