Problem 24.35 - Enhanced - with Feedback Part A The unit of current, the ampere,

Question

Problem 24.35 - Enhanced - with Feedback Part A The unit of current, the ampere, is defined in terms sections of very long wires a distance 5.0 m apart each carry a current of 1.0 A You may want to review (L pages 784-787) What is the force between them? (If the force between two actual wires has this value, the current is defined to be exactly 1 A.) of the force between currents. Two 1.0-meter-long Express your answer with the appropriate units. FValue Units Submit My Answers Give Up Provide Feedback Continue

Explanation / Answer

Two parallel wires with currents I and I .
The distance between them = a

The magnetic field caused by wire 1 on 2 is B
B = *I /2a
The force acting on wire 2 is F = B*I *L =>

F = *I * I*L/2a , plug in =4*106 , I= I=1, L= 5m a=1 =>
F = 4*106*5 /2 = 2*10

The force is 1*106N

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