A rectangular loop made of flexible conducting wire carrying clockwise current is placed in a uniform magnetic field B directed inwards into the plane of paper. The length and breadth of the loop are 'a' and 'b' units and the resistance is R. Choose the correct alternative(s). i) the loop develops induced anti clockwise current for a short time ii) the loop finally has area equal to 0.25(a+b)²iii) centre of mass of loop does not change its position iv) induced charge flown through the loop is [B(a²+b²+ab)] /πR

A rectangular loop made of flexible conducting wire carrying clockwise

1.	A rectangular loop made of flexible conducting wire carrying clockwise current is placed in a uniform magnetic field B directed inwards into the plane of paper. The length and breadth of the loop are 'a' and 'b' units and the resistance is R. Choose the correct alternative(s). i) the loop develops induced anti clockwise current for a short time ii) the loop finally has area equal to 0.25(a+b)²iii) centre of mass of loop does not change its position iv) induced charge flown through the loop is [B(a²+b²+ab)] /πR
Answer» A rectangular loop made of flexible conducting wire carrying clockwise current is placed in a uniform magnetic field B directed inwards into the plane of paper. The length and breadth of the loop are 'a' and 'b' units and the resistance is R. Choose the correct alternative(s). i) the loop develops induced anti clockwise current for a short time ii) the loop finally has area equal to 0.25(a+b)² iii) centre of mass of loop does not change its position iv) induced charge flown through the loop is [B(a²+b²+ab)] /πR