Question

Uf 1.6A of currunt flows tgrough a wire of cross sectional area 1mm^2 and if the

Answer 1

Explanation:

Step 1: Charge flow in one second

No. of electron flowing per second n=10

6

Amount of charge flowing per second

Q=ne=10

6

×1.6×10

−19

C=1.6×10

−13

C

Step 2: Current

Current is amount of charge flowing per second

I=Q/t=

1 sec

1.6×10

−13

C

=1.6×10

−13

A

Hence, Option B is correct.

[Note: In this problem there is no use of Area of cross section, it has been given just for confusing the students. If current density J(=

A

I

) had been asked, then we would have used the Area ]