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Drift speed of electrons, when 1.5 A of
Question
Drift speed of electrons, when
1
.
5
A
of current flows in a copper wire of cross section
5
m
m
2
, is
v
. If the electron density in copper is
9
×
1
0
2
8
/
m
3
the value of
v
in
m
m
/
s
is close to (Take
charge of electron to be
=
1
.
6
×
1
0
−
1
9
C
)
A
0
.
2
B
3
C
2
D
0
.
0
2
Medium
Open in App
Solution
Verified by Toppr
Correct option is D)
I
=
n
e
A
v
d
⇒
v
d
=
n
e
A
I
=
9
×
1
0
2
8
×
1
.
6
×
1
0
−
1
9
×
5
×
1
0
−
6
1
.
5
=
0
.
0
2
m
m
/
s
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