Magnetic field at a point r near a long straight current carrying wire is B.The field at a distance r/2

will be B/2

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will be B/4

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will be 2B

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will be 4B

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Solution

The correct option is C will be 2B

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Similar questions

The strength of the magnetic field at a point r near a long straight current carrying wire is B. The field at a distance $\frac{r}{2}$ will be

[MP PMT 1990]

r

i

2 r

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