The figure shows two long, parallel current-carrying wires. The wires carry equa

Question

The figure shows two long, parallel current-carrying wires. The wires carry equal currents I1 = I2 = 20 A in the directions indicated and are located at distance d = 0.5 m apart. Calculate the magnitude and direction of the magnetic field at the point P that is located at equal distance d from each wire. (mu 0 = 4 pi x 10^-7 T . m/A) 8. A circular loop of wire bee in the plane of the paper. An increasing magnetic field points out of the paper. What is the direction of the induced current in the loop? clockwise counter-clockwise counter-clockwise then clockwise clockwise then counter-clockwise There is no current induced in the loop.

Explanation / Answer

7)
B1 = B2 = mue*I/(2*pi*d)

= 4*pi*10^-7*20/(2*pi*0.5)

= 8*10^-6 T

angle between B1 and B2 is 120 degrees

Bnet = sqrt(B1^2 + B2^2 + 2*B1*B2*cos(120))

= B1

= 8*10^-6 T

direction : towards +y axis

8)

clockwise

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