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Physics
Physics
Problem
Which of the following gives the magnetic flux
Φ
B
\Phi_B
Φ
B
through a flat surface of area
A
A
A
placed in a uniform magnetic field of magnitude
B
B
B
making an angle
θ
\theta
θ
with the normal to the surface? a)
Φ
B
=
B
A
sin
θ
\Phi_B = BA \sin \theta
Φ
B
=
B
A
sin
θ
b)
Φ
B
=
2
B
A
cos
θ
\Phi_B = 2BA \cos \theta
Φ
B
=
2
B
A
cos
θ
c)
Φ
B
=
B
A
cos
θ
\Phi_B = BA \cos \theta
Φ
B
=
B
A
cos
θ
d)
Φ
B
=
B
A
cos
2
θ
\Phi_B = BA \cos^2\!\theta
Φ
B
=
B
A
cos
2
θ
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