Correct Answer - Option 1 : 0.02
Concept:
The average value of the induced emf across the coil is
\(E = N\frac{{dϕ }}{{dt}}\) ...(1)
Where,
E = Induced emf in volt
N = number of turns of the coil
ϕ = Total flux in webers
Calculation:
Given,
E = 40 V, t = 0.5 s, N = 1000
From equation (1),
\({40 = 1000 \times \frac{{dϕ }}{0.5}}\)
\(dϕ = \frac{{40 \times 0.5}}{{1000}}\)
dϕ = 0.02 weber
Flux linkage = 0.02 wb