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Physics
Physics
Problem
Which one of the following relations correctly gives the electrostatic force
F
\mathbf F
F
acting on a test charge
q
q
q
placed in an electric field
E
\mathbf E
E
? a)
F
=
−
q
E
\mathbf F = -q\,\mathbf E
F
=
−
q
E
b)
F
=
q
E
4
π
\displaystyle \mathbf F = \frac{q\,\mathbf E}{4\pi}
F
=
4
π
q
E
c)
F
=
q
E
\mathbf F = q\,\mathbf E
F
=
q
E
d)
F
=
q
∣
E
∣
\mathbf F = q\,|\mathbf E|
F
=
q
∣
E
∣
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