A current carrying rectangular loop PQRS |EMFJEEMAIN2023....

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JEE MAIN 2023

30-01-2023 S2

Question

A current carrying rectangular loop PQRS is made of uniform wire. The length PR = QS = 5 cm and PQ = RS = 100 cm. If ammeter current reading changes from I to 21, the ratio of magnetic forces per unit length on the wire PQ due to wire RS in the two cases respectively is :

Select the correct option:

A

1 : 2

B

1 : 4

C

1 : 5

D

1 : 3

✓ Correct! Well done.

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