alleryA magnetic flux through a coil changes from 4 Wb to 1 Wb in 0.3 s. The average EMF induced is:
A1 V
B3 V
C10 V
D30 V
Answer & Solution
Correct answer: C. 10 V
1. |EMF| = |ΔΦ / Δt| = |(1 − 4) / 0.3| = 3 / 0.3 = 10 V.
2. Sign (direction) depends on Lenz's law; magnitude is what's asked.
_Source: syllabus Physics Ch 6 §6.4 (worked numerical)_
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