A straight wire of diameter 0 5 mm carrying a current of 1 A

Last updated: 6/12/2023

A straight wire of diameter 0 5 mm carrying a current of 1 A is replaced by the another wire of 1 mm diameter carrying the same current The strength of the magnetic field far away is 1999 1997 one quarter of the earlier value one half of the earlier value twice the earlier value same as the earlier value