If the magnetic flux through a coil of 1200 turns increases from zero to $5.4 \times 10^{-5}$ Wb in 2.7 ms, what is the magnitude of the induced emf during this time

24 V

The correct answer is Option (2) → 24 V

Induced emf, $ε=-N\frac{d\phi_B}{dt}$ [Faraday's law]

where,

N = number of turns in coil = 1000 turns [given]

$\frac{d\phi_B}{dt}$ = Change in Magnetic flux with time

$ε=1000×\frac{5.4×10^{-5}}{2.7×10^{-3}}$

$=24V$