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Physics
Physics
Problem
When a charge
q
q
q
moves from point
A
A
A
to point
B
B
B
across an electric potential difference
Δ
V
=
V
B
−
V
A
\Delta V = V_B - V_A
Δ
V
=
V
B
−
V
A
, the change in its kinetic energy
Δ
K
\Delta K
Δ
K
is a)
q
V
B
q\,V_B
q
V
B
b)
−
q
Δ
V
-q\,\Delta V
−
q
Δ
V
c)
q
Δ
V
q\,\Delta V
q
Δ
V
d)
1
2
q
Δ
V
\tfrac12 q\,\Delta V
2
1
q
Δ
V
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