Magnetism Wire Loop: Solve Problem in 1.5 Hours

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ellatha
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Physics problems 5 and 6: problem 5 shows two parallel vertical wires labelled I1 and I2 with arrows pointing up, a point P between them on the x-axis; problem 6 shows two concentric circular loops in one plane.


Okay guys I have an hour and thirty minutes before my exam; I know how to do the top problem; just use the formula B = mew x current/(2 x pi x r) then add the magnetic fields and use the right-hand rule to get direction, but I'm stuck on the bottom one.
 
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Lenz's law states, that an induced current in the inner loop will try to prevent a change of flux through the inner loop, induced by the out loop.
 
ellatha said:
Homework figures: problem 5 shows two vertical infinite wires parallel to the y-axis, both with upward current arrows, labelled I1 and I2, with point P on the x-axis between them; problem 6 shows two concentric circular loops in one plane.


Okay guys I have an hour and thirty minutes before my exam; I know how to do the top problem; just use the formula B = mew x current/(2 x pi x r) then add the magnetic fields and use the right-hand rule to get direction, but I'm stuck on the bottom one.
In prob. 5 P is shown at (0.1,0) not at (0,0.1).
In prob. 6, remember Lenz's law?