The force per meter between the two wires on a jumper cable being used to start a stalled car is 0.225 N/m. What is the current (A) in the wires, given that they are separated by 2.00 cm

150 A

Explanation:

The magnitude of the force per unit length between two current-carrying wires is given by

where

is the vacuum permeability

are the currents in the two wires

r is the distance between the wires

And the force is:

In this problem, we have:

is the force per unit length

is the distance between the wires

The two wires carry the same current, so

Therefore we can re-arrange the equation to find the current:

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

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