a 4 b 3 c 2 d 2 Consider a long straight wire of cross

Last updated: 6/30/2023

a 4 b 3 c 2 d 2 Consider a long straight wire of cross sectional area A carrying a current i Let there be n free electrons per unit volume An observer places himself on a trolley moving in the direction opposite to the current with a speed u and separated from the wire by a distance r The magnetic field seen by the observer is very nearly t nAe Ho i Ho i 2 i b zero 2 r Tr Tr a c d