Question

Static electricity can be produced by

• A. Only induction
• B. Only friction
• C. Only chemical reaction
• D. Induction and friction

Answer 1

The correct option is D

Induction and friction

Explanation for the correct option

1. Static electricity can be produced by rubbing one object with another. Rubbing cause an imbalance in electrons and the electron is transferred to another object in contact. This produces static electricity.
2. A common example is when we rub a balloon on our head, an electron from our hair moves to the balloon and so the hair becomes positively charged and the balloon become negatively charged. This separation of charge produces static electricity.
3. Static electricity can also be produced by induction. When a charged object is held near an uncharged object then there is a flow of charge between the two objects without in contact. If the charged particle is positively charged then a negative charge will be induced in the other object and vice versa.

So static electricity can be produced by both friction and induction.

Hence, option D is correct