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  • At what distance A straight wire of diameter 0.2mm carrying a curent of 1A is replaced by another wire of 1mm diameter carrying same current. The strength of magnetic field far away is.<di

At what distance A straight wire of diameter 0.2mm carrying a curent of 1A is replaced by another wire of 1mm diameter carrying same current. The strength of magnetic field far away is.

Option: 1

twice the earlier value


Option: 2

Same as the earlier value.


Option: 3

one half of the parollers value


Option: 4

 one quarters of the earlier value


Answers (1)

best_answer

B=\frac{\mu_0 i}{2 \pi n}  and so it is independent of thickness. The current is same in both the wires, hence magnetic field will be same

Posted by

Pankaj

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