Question

When a plastic ruler is rubbed with a cloth, it becomes negatively charged and the cloth becomes positively charged by an equal amount.Which of the following principle explain this phenomena.

• A.
  Quantisation of charge
• B.
  Additivity of charge
• C.
  Conservation of charge
• D.
  None of the above.

Answer 1

The correct option is C

Conservation of charge
When we rub a cloth with a plastic ruler then some electrons are transferred from the cloth to the ruler and so the ruler gets a negative charge and the cloth gets an equal positive charge and therefore we can see that no charge is being created or destroyed which means that the conservation of charge principle is the best possible answer here.