question_answer

A coil of effective area \[4\text{ }{{m}^{2}}\]is placed at right angles to the magnetic induction B. The e.m.f. of \[0.32\text{ }V\]is induced in the coil. When the field is reduced to 20% of its initial value in sec. Find B (in\[wb/{{m}^{2}}\]).

Answer:

0.05