Charging by Friction
Trending Questions
Q. Glass rod when rubbed with a silk cloth acquires ___ charge and the silk cloth acquires ___ charge.
- positive, positive
- positive, negative
- negative, positive
- negative, negative
Q.
The materials in which charges move easily are called insulators.
- True
- False
Q.
When a glass rod is rubbed with silk cloth, the glass rod acquires ________charge.
Q. Write true or false for this statement:
A glass rod rubbed with silk repels an ebonite rod rubbed with fur.
A glass rod rubbed with silk repels an ebonite rod rubbed with fur.
Q. When a balloon is rubbed against a polythene, both of them acquire
Q. Statement 1) Plastic rod becomes negatively charged when rubbed with fur.
Statement 2) Glass rod becomes positively charged when rubbed with wool.
Explain both statements. [2 marks]
Statement 2) Glass rod becomes positively charged when rubbed with wool.
Explain both statements. [2 marks]
Q. Inflate two balloons and rub both of them with a cloth first and then with different material. Will they attract each other in both cases?
Q. When a charged balloon A is brought near another charged balloon B, they repel each other. When balloon B is brought near another charged balloon C, it attracts. Choose the correct statements.
- If A is positively charged, C
must also be positively charged.
- Balloons A and C are carrying
similar charges. - All three balloons A, B and C are carrying similar charges.
- If B is negatively charged, C must also be positively charged.
Q. A glass rod rubbed with silk is suspended near an ebonite rod rubbed with fur. What will be your observation? Give a reason to your answer.
Q. If we take two woollen cloths and two similar balloons, and rub the woollen cloth on each of the balloons one by one, both the balloons will become
- oppositely charged
- similarly charged
- neutral
Q. A plastic bag rubbed with cotton wool acquired a positive charge. This happened because:
(a) the plastic acquired extra protons from the cotton.
(b) the plastic acquired extra protons on rubbing.
(c) new protons were created on the plastic while rubbing.
(d) the plastic lost electrons to the cotton during rubbing.
(a) the plastic acquired extra protons from the cotton.
(b) the plastic acquired extra protons on rubbing.
(c) new protons were created on the plastic while rubbing.
(d) the plastic lost electrons to the cotton during rubbing.
Q.
Glass does not allow_________ to flow through it.
Q. what is factor
