First slide

Force on a current carrying wire placed in a magnetic field

Question

A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to the one of the sides of the loop and is in the plane of the loop. If a steady current I is established in wire as shown in figure, the loop will

Moderate

A

Rotate about an axis parallel to the wire
B

Move away from the wire or towards right
C

Move towards the wire
D

Remain stationary

Solution

$\begin{array}{l} ∵ r_{1} < r_{2} \\ So F_{1} < F_{2} \\ \Rightarrow F_{net} = (F_{1} - F_{2}) towards the wire \end{array}$

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