Question

rectangular coil of copper wires is rotated in magnetic field the direction induced current change once in each
a) 2 Revolution
b) 1 Revolution
c) half Revolution
one fourth revolution

Answer 1

in one fourth revolution.... becuz is the basis of production of alternating current.

one complete rotation equal to 360 degree but the current reverses its direction after 90 degrees

Answer 2

According to the circumstances mentioned in the question that,

Rectangular coil of copper wires is rotated in magnetic field the direction induced current change once in each

one fourth revolution.

So the correct option is option "C".

Because a complete rotation is equals to 360° but due to the principles of the alternating current ,the current flow changes it's direction in every 90°.

So it takes four times for a revolution.

That's why I want 1/4th is the correct answer.