Question

1. Shown are four current carrying outer wires have currents either com four current carrying wires each with the same magnitude of the current. The lave currents either coming out of the page or going into the page as shown 3 a square. What is the direction of the net magnetic field on the upper left wire? b. d. e. No net field Shown are four current carrying wires of length 1.50 m going into and out of the page, The four outer wires form a square with sides of length 0.500 m. The direction of the current in each wire is indicated. If the current is the same in each wire and has a value of 4,00 A, what is the magnitude of the net magnetic force on the upper left wire? a. 6.8 un b. 13.6uN c. 12.4uN d. 1.4uN e. 9.6 UN F: IL Bwa

Answer 1

1] Magnetic field due to right wire will be upward, due to bottom left wire will be rightward, field due to bottom right wire will not have much effect as it is far from it ,

so option c is correct

2] Force on upper left wire = u0i^2L/2pia * sqrt2 - u0i^2L/[2pi*a*sqrt2]

= (2e-7*4^2*1.5/0.5)*sqrt2 - (2e-7*4^2*1.5/0.5)*[1/sqrt2]

= 6.8*10^-6 N = 6.8 uN

option a