If the extension in both the springs inc...

If the extension in both the springs increases from x to `x_0` on flowing current `i` in the rod from B to A then, the value of magnetic field will be -

`(mg)/(li)`

`(mgx)/(li)`

`(mgI)/(lx_0)`

`(mg(x_0-x))/(lix)`

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If the extension in both the springs increases from x to `x_0` on flowing current `i` in the rod from B to A then, the value of magnetic field will be -

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