Magnetic field due to currentHard
Question
Two thick wires and two thin wires, all of the same materials and same length form a square in the three different ways P, Q and R as shown in figure with current connection shown. The magnetic field at the centre of the square is zero in cases :-
Options
A.in P only
B.in P and Q only
C.in Q and R only
D.P and R only
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