Saved Bookmarks
| 1. |
Two long and parallel straight wire A and B carrying currents of 8.0 A and 5.0 A in the same direction are separated by a distance of 4.0 cm. Estimate the force on a 10 cm section of wire A. |
|
Answer» Solution :Here `l_1 = 8.0A, l_2 = 5.0 A and d = 4.0 cm = 4 xx 10^(-2) m` `:.` FORCE on length `l = (10 cm = 0.1 m)` of wire A `F = (mu_0)/(4 PI) cdot (2I_1 I_2)/(d) cdot l = (10^(-7) xx 2 xx 8 xx 5)/(4 xx 10^(-2)) xx 0.1 = 2 xx 10^(-5)N` As TWO wires carry currents in the same direction, the force is attractive force NORMAL to wire A towards the wire B. |
|