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Physics
Physics
Problem
Which expression gives the magnitude of the magnetic force on a charge
q
q
q
moving with speed
v
v
v
at an angle
θ
\theta
θ
to a uniform magnetic field of magnitude
B
B
B
? a)
q
v
B
sin
2
θ
q v B\sin^{2}\theta
q
v
B
sin
2
θ
b)
1
2
q
v
B
sin
θ
\dfrac{1}{2}\,q v B\sin\theta
2
1
q
v
B
sin
θ
c)
q
v
B
sin
θ
q v B\sin\theta
q
v
B
sin
θ
d)
q
v
B
(
1
−
cos
θ
)
q v B\bigl(1-\cos\theta\bigr)
q
v
B
(
1
−
cos
θ
)
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