Question

A solid conductor has a cross-section area 1 cm2 and 2cm2 as shown in the figure. A current of 20A entering at A. Then​

Answer 1

Answer:

The relation between current and drift velocity

I.e1=V

d

.e.n.a

where I= current

V

d

= current velocity

e= electron

n= no. of electrons per unit volume

a= area of cross section

Now, V

d

=

nea

I

=

1×10

−4

×9×10

7

×28

10

=1.94×10

−3

m/s