Like charges attract

Unlike charges repel

Like charges repel

Charges have no effect on each other

5 N

2.5 N

20 N

40 N

$$+1.6 \times 10^{-19}$$ C

$$-1.6 \times 10^{-19}$$ C

$$+1.6 \times 10^{19}$$ C

$$-1.6 \times 10^{19}$$ C

Directly proportional to the product of the charges

Inversely proportional to the square of the distance between them

Directly proportional to the distance between them

Both a and b

It increases

It decreases

It remains constant

It oscillates

Charge can be created or destroyed

The total charge in an isolated system remains constant

Charge always flows from positive to negative

Charge is always quantized

Rubber

Glass

Copper

Wood

$$9 \times 10^9$$ N/C

$$18 \times 10^9$$ N/C

$$4.5 \times 10^9$$ N/C

$$2.25 \times 10^9$$ N/C

Friction

Conduction

Induction

Radiation

Positive

Negative

Zero

It depends on the atom

Point towards the charge

Point away from the charge

Form closed loops

Are always parallel

$$27 \times 10^9$$ N

$$54 \times 10^9$$ N

$$108 \times 10^9$$ N

$$216 \times 10^9$$ N

They can cross each other

They always form closed loops

They start on positive charges and end on negative charges

They repel each other

It becomes $$\frac{1}{3}$$ of the original force

It becomes $$\frac{1}{9}$$ of the original force

It becomes 3 times the original force

It becomes 9 times the original force