PLEASE COULD SOMEONE HELP ME OUT
posted by John .
Two long straight aluminum wires, each of diameter 0.30mm, carry the same current but in opposite directions. They are suspended by 0.50m long strings...If the suspension strings make an angle of 3.0 degree with the vertical, what is the current in the wires?
Thank you...please help i don't get this

PLEASE COULD SOMEONE HELP ME OUT 
Ms. Sue
If you really want help, you'd type in your subject name so that an expert would see your post.

PLEASE COULD SOMEONE HELP ME OUT 
Elena
Separation between two wires is
b=2Lsinα=2•0.5•sin3⁰=5.23•10⁻² m
The mass of 1 meter of the wire is
m₀=ρπd²/4,
where ρ is the density of Al
The force between two wires (per 1 meter) is
F=μ₀I²/2πd.
F=Tsinα
mg=Tcosα
F/m₀g=tanα
μ₀•I²/2π•b•m₀•g= tanα
I=sqrt{2π•b•m₀•g •tanα/ μ₀}=
=sqrt{2π•b•ρ•π•d²•g/4•4π•10⁻⁷)=.. 
PLEASE COULD SOMEONE HELP ME OUT Physics 
John
Hi Elena thank you, but this is what I did and i got it wrong
sqrt(2π*5.23x10^2*2700*π*2.25x10^6*9.8/4*4π*10^7)= 1.38x10^4 but it is wrong
what did i do wrong aluminum density is 2700 kg/m^3 and 2.25x10^6 is .30 mm divided by 100 to get meters an then divided by 2 to get r and square that so gives me 2.25x10^6
Respond to this Question
Similar Questions

physics
Two long straight wires are parallel and 9.0 cm apart. They are to carry equal currents such that the magnetic field at a point halfway between them has magnitude 320 µT. (a) Should the currents be in the same or opposite directions? 
Physics
Two long parallel wires separated by a distance, d, carry currents in opposite directions. If the lefthand wire carries a current i/2, and the righthand wires carries a current i, determine where the magnetic field is zero. 
Physics
Two long, straight, parallel wires carry current in the same direction. If the wires are 24 cm apart and carry currents of 2.0 A and 4.0 A, respectively, find the force per unit length on each wire? 
Physics please help
Two long straight aluminum wires, each of diameter 0.30mm, carry the same current but in opposite directions. They are suspended by 0.50m long strings...If the suspension strings make an angle of 3.0 degree with the vertical, what … 
Physics please help
Two long straight aluminum wires, each of diameter 0.30mm, carry the same current but in opposite directions. They are suspended by 0.50m long strings...If the suspension strings make an angle of 3.0 degree with the vertical, what … 
PLEASE COULD SOMEONE HELP ME OUT Physics
Two long straight aluminum wires, each of diameter 0.30mm, carry the same current but in opposite directions. They are suspended by 0.50m long strings...If the suspension strings make an angle of 3.0 degree with the vertical, what … 
physics
An object of weight 50 N is suspended vertically by two strings. The strings are of the same lenght and the angle between them is 60 degree. Draw a free body diagram of the forces acting on the object. Calculate the tension in the … 
Physics
Suppose two conducting wires each of mass 25g and length 40m are both hanging from a support beam. When the circuit is turned on, the wires repel each other so that the angle between the supporting strings is 30 degrees at a height … 
Elective maths
A particle P of mass 7kg is suspended by two inextensible strings AP,BP of lengths 40cm and 75cm respectively. The ends, AP of the strings are attached to two point at the same level, whose distance apart is 85cm. Find angle APB and … 
Physics II
Two long straight parallel wires separated by L2 = 8.16 cm carry currents of equal magnitude but heading in opposite directions. The wires are shown perpendicular to the plane of this page. Point P is L1 = 1.96 cm from wire 1 and the …