What is the l in your equation?mba444 said:Homework Statement
A long, thin conductor carries a current of
8.93 A.
At what distance from the conductor is
the magnitude of the resulting magnetic field
4.79 × 10−5 T? Answer in units of cm.
Homework Equations
B= Uo*I*l/(2*pi*d)
The Attempt at a Solution
i used this equation to figure out the distance but i keep getting the wrong answer
can someone explain wats going wrong ?!
thanx
Well, the formula is incorrect, which probably explains why you've been getting the wrong answer. How did you arrive at that particular formula?mba444 said:its the length
That looks good to me.mba444 said:Oops
i mixed up the parallel conducters equation with the straight wire equation
therefore is this the one B=Uo*i/2*pi*d
I'd recheck your arithmetic and make sure that you are punching the numbers into your calculator correctly.mba444 said:wrong answer !
d=(4*pi*10^-7*8.93)/(2*pi*4.79*10^-5)= 0.011869 this is in meters so i converted it into cm i got 1.1869
Well using your numbers I get a different answer. You must be punching the numbers into your calculator incorrectly.mba444 said:i did checked it again but still the same answer
Still not the same answer as I get. All I can suggest is that you check the manual that came with your calculator to ensure that you are entering the numbers correctly.mba444 said:oka i got 13.0501 cm after correct my calculation but still the answer is wrong !
To find the magnetic field from a current bearing conductor, you can use the right-hand rule. Point your thumb in the direction of the current and curl your fingers. The direction your fingers curl will indicate the direction of the magnetic field.
The strength of the magnetic field is directly proportional to the current in the conductor. This means that as the current increases, the magnetic field strength also increases.
The magnetic field strength decreases as the distance from the conductor increases. This is because the magnetic field spreads out as it moves away from the conductor, making it weaker at a greater distance.
The unit of measurement for magnetic field is the tesla (T). In some cases, it may also be measured in gauss (G), with 1 T equal to 10,000 G.
The shape of the conductor can affect the magnetic field in a few ways. A straight conductor will produce a magnetic field that is parallel to the conductor, while a coiled or looped conductor will produce a more concentrated and stronger magnetic field. Additionally, the magnetic field produced by a flat, thin conductor will be weaker than that of a thicker, cylindrical conductor.