Problem 20.36 Two straight parallel wires are separated by 7.5 cm . There is a 2

Question

Problem 20.36 Two straight parallel wires are separated by 7.5 cm . There is a 2.0-A current flowing in the first wire. Part A If the magnetic field strength is found to be zero between the two wires at a distance of 2.0 cm from the first wire,what is the magnitude of the current in the second wire? Express your answer using two significant figures and include the appropriate units. I= Value Units Submit My Answers Give Up Part B What is the direction of the current in the second wire? same direction as the other current direction opposite to the current in the first wire

Explanation / Answer

part a)

uoI1/2pi(0.02)=uoI2/2pi(0.075-0.02)

I2=(2)(0.75-0.02)/(0.02)

part b)

since field is zero between the wires

so the current in teh second wire must be in teh direction oposite to the first wire

also given

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