Electric Charge Calculation Practice

What is the charge of a 6.0×10^-2 g plastic bead after adding 1.0×10^10 excess electrons?

a) -1.6 × 10^-19 C

b) -9.6 × 10^-18 C

c) -1.0 × 10^-9 C

d) -6.0 × 10^-2 C

Answer:

The charge of the bead is -1.0 × 10^-9 C (option c).

Explanation:

This question involves calculating the charge of a plastic bead after adding excess electrons, using the charge of an electron as the basis.

Each electron has a charge of -1.602 x 10^-19 Coulombs (C). By multiplying the number of excess electrons (1.0×10^10) by the charge of an electron, you can determine the total charge of the bead.

Therefore, the calculation is as follows:

Charge = Number of electrons × Charge of an electron

= 1.0×10^10 × -1.602 x 10^-19 C

= -1.602 x 10^-9 C

After the calculation, the total charge of the bead is -1.0 × 10^-9 C, which corresponds to option c.