A straight wire of diameter 0 5 mm carrying a current of 1 A is replaced by another wire…
Physics · Class 12 · CBSE — Moving Charges and Magnetism
A straight wire of diameter \(0\cdot5\) mm carrying a current of 1 A is replaced by another wire of 1 mm diameter carrying the same current. The strength of the magnetic field far away is
- twice the earlier value
- one half of the earlier value
- one quarter of the earlier value
- same as the earlier value
Answer
(D) same as the earlier value
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