q about f=bil (1 Viewer)

[Libbster]

I just want to check, is the formula actually F=nBILsin@ when u have more than one coil?

 

[richz]

yes.................

 

[rama_v]

If you have a coil u use the formula for torque (presuming your finding torque that is)

 

[serge]

I just want to check, is the formula actually F=nBILsin@ when u have more than one coil?

something's messed up

(this isnt the coil equation
you dont have the length of coil used,
you have the area that the coil makes)

this is the force experienced
by a moving wire in a magnetic field

rama's talking about t= nBIAcos@

 

[Libbster]

ok....... i'm talking about when u want to find the force acting on a wire in a magnetic field but when they specify there is more than one. perhaps i should have made myself more clear.

 

[helper]

Just be careful of what the question says. If it says the force per length of wire, then no. If they ask for the force on the side of the coil then yes.

 

[serge]

ok....... i'm talking about when u want to find the force acting on a wire in a magnetic field but when they specify there is more than one. perhaps i should have made myself more clear.

when there is more than one

do you mean a current is going through both wires and
they experience a force?

 

[helper]

Eg. A 1 cm<sup>2 square coil consisting of 10 loops and carrying 2A is placed in a 10mT magnetic field,
Calculate:
a) The force on a length of wire in one side of the coil, that is perpendicular to the coil (no n)
b) The force acting one side of the coil, that is perpendicular to the coil (use n)
c) The torque on the coil (use Torque formula)

A poorly written question but shows the different cases.</sup>