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Questions  

The value of the magnetic field at a distance x from along straight current-carrying conductor is proportional to :

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By Expert Faculty of Sri Chaitanya
a
x
b
x2
c
1/x2
d
1/x

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detailed solution

Correct option is D

Magnetic field due to a long straight current carrying wire at a distance x = μoi2πxHence magnetic field is inversely proportional to the distance x from the wire
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Four long insulated current carrying wires, cross each other as shown in the figure. If the separation between any pair of parallel wires is d, the magnetic induction at O is

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