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Physics
Physics
Problem
Which of the following gives the magnitude of torque acting on a coil of
N
N
N
turns and area
A
A
A
carrying current
I
I
I
when its plane makes an angle
θ
\theta
θ
with a uniform magnetic field
B
B
B
? a)
τ
=
N
I
A
B
sin
θ
\tau = NIAB\sin\theta
τ
=
N
I
A
B
sin
θ
b)
τ
=
N
I
A
B
cos
θ
\tau = NIAB\cos\theta
τ
=
N
I
A
B
cos
θ
c)
τ
=
N
I
A
B
\tau = NIAB
τ
=
N
I
A
B
d)
τ
=
N
I
A
B
sin
2
θ
\tau = NIAB\sin 2\theta
τ
=
N
I
A
B
sin
2
θ
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