Question

As shown in the figure, a magnet is moved with a fast speed towards a coil at rest. due to this induced e.m.f, induced current and induced charge in the coil is $e$, $i$ and $q$ respectively .if the speed of the magnet is doubled , the incorrect statement is:

• A. $e$ increases
• B. $q$ remains same
• C. $i$ increases
• D. $q$ increases

Answer 1

Answer: (D)

$q$ increases

with the increasing in the time rate of change flux, both induced emf and current increase. But the induced charge does not depend upon time. So, it would remain the same. Hence charge remains same, and e and I will increases.

So option 'D' is incorrect.