JEE Main 2022 Physics question

Two long current carrying conductors are placed parallel to each other at a distance of 8 cm between them. The magnitude of magnetic field produced at mid-point between the two conductors due to current flowing in them is 30 . The equal current flowing in the two conductors is:

(1)30 A in the same direction
(2)30 A in the opposite directionCorrect
(3)60 A in the opposite direction
(4)300 A in the opposite direction

Answer: (2)

Solution

At the mid-point the net field is non-zero only if the currents are in opposite directions (the two fields then add). Each wire is 4 cm from the

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Question ID VK-035174