# Eletric charge

1. Apr 4, 2010

### zelda1850

1. The problem statement, all variables and given/known data

which quantity of excess electric charge could be found on an object

1) 6.25 x 10 exponenet -19 c
2) 4.80 x 10 exponent -19 c
3) 6.25 elementary charges
4) 1.60 elementary charges

2. Relevant equations

i know that 1.60 x 10 exponenet - 19 c is one element charge

3. The attempt at a solution

but i dont know how many charges are in a object

2. Apr 4, 2010

### ideasrule

Can you find 2.5 elementary charges in an object?

3. Apr 4, 2010

### Cilabitaon

The simplest charge on an object is that which you stated $$1.6 \times 10^{-19}C$$, which is one electronic charge.

An 'object' is far too vague, this doesn't give us any information on the type of object, whether it is charged/uncharged or +ve/-ve charge.

Are you sure you aren't missing any of the question?

4. Apr 4, 2010

### zelda1850

is it right that 4.80 x 10 exponenet - 19 c work since it gives 3 elementary charge

5. Apr 4, 2010

### Cilabitaon

Bingo, as all the others are fractions of an elementary charge.

Glad you weren't fooled by the 4th choice, I assume many people will be.