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Physics
Physics
Problem
Which one of the following expressions represents the total force
F
⃗
\vec F
F
acting on a charge
q
q
q
moving with velocity
v
⃗
\vec v
v
in the simultaneous presence of uniform electric field
E
⃗
\vec E
E
and magnetic field
B
⃗
\vec B
B
? a)
F
⃗
=
q
(
E
⃗
+
B
⃗
×
v
⃗
)
\vec F = q\,(\vec E + \vec B \times \vec v)
F
=
q
(
E
+
B
×
v
)
b)
F
⃗
=
q
(
v
⃗
×
B
⃗
)
\vec F = q\,(\vec v \times \vec B)
F
=
q
(
v
×
B
)
c)
F
⃗
=
q
(
E
⃗
+
v
⃗
×
B
⃗
)
\vec F = q\,(\vec E + \vec v \times \vec B)
F
=
q
(
E
+
v
×
B
)
d)
F
⃗
=
q
(
E
⃗
−
v
⃗
×
B
⃗
)
\vec F = q\,(\vec E - \vec v \times \vec B)
F
=
q
(
E
−
v
×
B
)
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