Please help me with these physics problems! Suppose in the drawing that 11 12 =

Question

Please help me with these physics problems!

Suppose in the drawing that 11 12 = 57.6 A and that the separation between the wires is 0 0207 m. By applying an external magnetic field created by a source other than the wires) it is possible to cancel the mutual repulsion of the wires. This external field must point along the vertical direction. (a) Does the external field point up or down? (b) What is the magnitude of the external field? Wire 1 Wire 2 2 Repulsion (a) The external field points o. (b) Number Units

Explanation / Answer

a)

a) point down

when magnetic filed direction is point down, the magnetic filed exert force wire 1 towards +x axis

and on wire2 towards -x axis.

these forces are balanced by the force btween the wires.

b) Let B is the required magnetic field.

I1 = I2 = I = 57.6 A

force between the wire = force exerted by external magnetic field

mue*I*I*L/(2*pi*d) = B*I*L*sin(90)

==> B = mue*I/(2*pi*d)

= 4*pi*10^-7*57.6/(2*pi*0.0207)

= 5.57*10^-4 T <<<<<<-----Answer

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.