A current carrying rectangular loop PQRS is made of uniform wire.… | JEE Main 2023 Physics PYQ

MCQEasyJEE Main 2023 · 30 January, Shift 2Force on Current-Carrying Conductor

A current carrying rectangular loop PQRS is made of uniform wire. The length $PR = QS = 5 \, \text{cm}$ and $PQ = RS = 100 \, \text{cm}$ . If ammeter current reading changes from $I$ to $2I$ , the ratio of magnetic forces per unit length on the wire PQ due to wire RS in the two cases respectively is :

A rectangular loop PQRS with P top left, Q top right, R bottom left, S bottom right, current entering from left and exiting through an ammeter on the right.

A
$1 : 2$
B
$1 : 4$
C
$1 : 5$
D
$1 : 3$

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