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Two thick wir...

Question

Two thick wires and two thin wires, all of same material and same length, from a square in three different ways A, B and C as shown in the figure. with correct connection shown. the magnetic field at the centre of the square is zero in case of

A

A only

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B

A & B only

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C

B & C only

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D

A & C only

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Solution

The correct option is D A & C only
GIVEN
Three sets of wires A,B,C
They are made of different combination of thick and thin wires.
Solution
In wire set A
By right hand thumb rule , direction of magnetic fields of thick wires and thin wires get cancelled.
Similarly in set C
The correct option is D

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