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Physics
Physics
Problem
Which one of the following expresses the current
I
I
I
in a conductor in terms of drift velocity
v
d
v_d
v
d
, number density of charge carriers
n
n
n
, electronic charge
e
e
e
and cross-sectional area
A
A
A
? a)
I
=
n
e
A
v
d
I = \dfrac{n e A}{v_d}
I
=
v
d
n
e
A
b)
I
=
n
e
A
v
d
I = n e A v_d
I
=
n
e
A
v
d
c)
I
=
n
e
v
d
A
I = \dfrac{n e v_d}{A}
I
=
A
n
e
v
d
d)
I
=
n
e
2
A
v
d
I = n e^{2} A v_d
I
=
n
e
2
A
v
d
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