Question

$AB$ is a long wire carrying a current $I_1$ and $PQRS$ is a rectangular loop carrying currect $I_2$ (as shown in the figure)
which among the following statements are correct?
(a) Arm $PQ$ will get attracted to wire $AB$, and the arm $RS$ will get repelled from wire $AB$
(b) Arm $PQ$ will get repelled from wire $AB$ and arm $RS$ attracted to wire $AB$
(c) Forces on the arm $PQ$ and $RS$ will be unequal and opposite
(d) Forces on the arm $PQ$ and $RS$ will be zero

• A. Only (a)
• B. (b) and (d)
• C. (a) and (c)
• D. (b) and (c)

Answer 1

The correct option is C (a) and (c)

$\because$ current in wire $AB$ and $PQ$ are in the same direction. Therefore they will attract
$\because$ current in wire $AB$ and $RS$ are in opposite direction. Therefore they will repeal each other
magnetic field around $PQ$ more than $RS$. So force on the arms $PQ$ and $RS$ will be unequal and opposite