Force on current carrying conductor

[uzair_ha91]

1. The problem statement, all variables and given/known data

A 20cm wire carrying a current of 10A is placed in a uniform
magnetic field of 0.3T. If the wire makes an angle of 40 degrees with
the direction of magnetic field, find the force acting on the wire.


2. Relevant equations

F=LIB sin<theta>

3. The attempt at a solution

I got the answer:: 0.35, but in the textbook, the answer written at the back is 0.39....which one's correct??

[Dadface]

1. The problem statement, all variables and given/known data

A 20cm wire carrying a current of 10A is placed in a uniform
magnetic field of 0.3T. If the wire makes an angle of 40 degrees with
the direction of magnetic field, find the force acting on the wire.


2. Relevant equations

F=LIB sin<theta>

3. The attempt at a solution

I got the answer:: 0.35, but in the textbook, the answer written at the back is 0.39....which one's correct??

Rounding my answer down I agree with the book.I bet you punched the wrong calculator button when you was working out the sin.Sin40=0.643