Question

Two charges of -10C and 30C are separated by 30 cm. What is the ratio of the forces acting on them?

Answer 1

Two charges of -10C and 30C are separated by 30 cm. What is the ratio of the forces acting on them?

Solution

The forces acting on both charges are the same, but are directed in different directions.

$$F _ {1} = F _ {2} = \frac {k q _ {1} q _ {2}}{r ^ {2}} = \frac {9 \cdot 1 0 ^ {9} 1 0 \cdot 3 0}{(3 0 \cdot 1 0 ^ {- 2}) ^ {2}} = 3 \cdot 1 0 ^ {1 3} N$$

The ratio $= F_{1} / F_{2} = 1$ .