A metallic object holds a charge of −5.3 × 10−⁶ C.What total number of electrons does this represent? (e = 1.6 × 10−¹⁹ C is the magnitude of the electronic charge. )

Question

Quizplus · Accepted Answer

The charge on the object is given as -5.3 × 10^-16 C. 
The electronic charge is given as 1.6 × 10^-19 C. 
To find the total number of electrons, we divide the charge on the object by the electronic charge:

(-5.3 × 10^-16 C) / (1.6 × 10^-19 C) = -3.3125 × 10^3

The result is negative because the object has a net negative charge. 
The absolute value of the answer gives the total number of electrons:

| -3.3125 × 10^3 | = 3.3 × 10^3

Therefore, the total number of electrons is 3.3 × 10^3, which is option C.

A Metallic Object Holds a Charge of −5