Question

A square loop of side 22cm is changed to a circle in time 0.4 sec with its plane normal to a inagnetic field 0.2T. The emf induced is

• A. +6.6mv
• B. -6.6mv
• C. +13.2mv
• D. -13.2mv

Answer 1

Answer: (B)

$e=-B\frac{\Delta A}{\Delta t}$