Question

Q2. Calculate the current in a wire if

1019 electrons flow in a the wire for 1.6

seconds.


please explain step by step​

Answer 1

Answer:

12th

Physics

Current Electricity

Electric Current

Charge on an electron is 1....

PHYSICS

Charge on an electron is 1.6×10

−19

coulomb. Number of electrons passing through the wire per second on flowing of 1 ampere current through the wire will be

MEDIUM

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ANSWER

The current is defined as rate of flow of charged particle.i.e.

i =

t

Q

Hence the charge flown is,

Q =i t

Hence Q =1.0×1=1C

The charge Q is due to electrons, therefore,

Q =N×e

Here Q =1C

If N is number of electrons passing and e is the electronic charge of value 1.6×10

−19

Then,

N =

e

Q

=

1.6×10

−19

1

=0.625×10

19

electrons

Answer 2

The current is defined as rate of flow of charged particle i.e.

$i = \frac{Q}{t}$

Hence, the charge flown is,

Q = i t

Hence, Q = 1.0 × 1 = 1C

The charge Q is due to electrons,

∴ Q = N × e

Here Q = 1C

If N is number of electrons passing and e is the electronic charge of value $1.6 \times { 10}^{ - 19}$

Then,

$N = \frac{Q}{e} = \frac{1}{1.6 \times {10}^{ - 19} } = 0.625 \times {10}^{19}$