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A straight wire of diameter 0.5 mm carrying a current of 1 A is replaced by another wire of 1 mm diameter carrying same current. The strength of magnetic field far away is (a) Twice the earlier value (b) Same as the earlier value (c) One-half of the earlier value (d) One-quarter of the earlier value



A straight wire of diameter 0.5 mm carrying a current of 1 A is replaced by another wire of 1 mm diameter carrying same current. The strength of magnetic field far away is


(a)    Twice the earlier value


(b)    Same as the earlier value


(c)    One-half of the earlier value


(d)    One-quarter of the earlier value


Grade:upto college level

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
7 years ago

(b)

The current is same in both the wire, hence magnetic field induced will be same.

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