Question

can the excess charge on a body be 1.25×10^-19C or 2.25×10^-19C?​

Answer 1

Answer:

The basic formula for electric current through a conductor is ,

I= nq/t

Where, I is electric current, elementary charge and n is number of electrons.

Now what you have given is, I= 2A, q= 1.6x10^-19 C and t= 1 second

Note: unit of current is ampere only when charge is measured in coulomb and time is measured in seconds. If time is measured in hours or mins, you first have to convert it into seconds. Also, since n is number of electrons, it is a unitless quantity.

Now plugging in all the values in the advice formula will give you answer i.e number of electrons.

2= n(1.6x10^-19)/1

n= 2/1.6x10^-19

n= 1.25 x 10^19