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Physics
Physics
Problem
Which of the following gives the magnitude of the magnetic force on a straight wire of length
l
l
l
that carries a current
I
I
I
and makes an angle
θ
\theta
θ
with a uniform magnetic field of magnitude
B
B
B
? a)
F
=
I
l
B
F = IlB
F
=
I
l
B
b)
F
=
I
l
B
tan
θ
F = IlB\tan\theta
F
=
I
l
B
tan
θ
c)
F
=
I
l
B
sin
θ
F = IlB\sin\theta
F
=
I
l
B
sin
θ
d)
F
=
I
l
B
cos
θ
F = IlB\cos\theta
F
=
I
l
B
cos
θ
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