Question

A current of 1 mA flows in a conductor. The rate of flow of electrons is
1) 6.25x10^18 2) 6.25x10^15
3) 0.625x10^18 4) 6.25​

Answer 1

Answer:

2) 6.25x10^15

Explanation:

1ma= 1000 x 1 A

=1000 A

When 1000 Coulomb charge flow through a wire in 1 second then the current through the wire is 1000 AMPERE.

I=Q/t

1 Ampere = 1 Coulomb /1 Second

Charge on 1 electron = 1.6 x 10^-19 Coulomb

By unitary method,

If 1.6 x 10^-19 Coulomb / Second (Ampere) = Current by 1 electron

then, 1( Coulomb / Second) or (Ampere) = 1000 / (1.6 x 10^-19) electrons

i.e, 6.25 x 10^15 electrons.

Mark Me Brainliest

Answer 2

we know that

1 Milli Ampre = 1000A

Now

1 coulomb of charge = 1.9*10^-16 electron

in 1 second number of electron flow =1000/1.6*10^-19= 6 .25*10^15 coulomb /second