1. How is a body charged by friction? 107
2. Why does a glass rod get positively charged when ru
3. Explain why the leaves of a negatively charged elect
rod is brought near the disc of the electroscope.
4. Define charging by conduction.
5. What is meant by earthing of an electrical device?
6. How is a short circuit caused?
7. What is meant by overloading of an electric circuit
8. List two precautions while handling electricity.
Answers
Answer:
1. by rubbing or sliding
2. a glass gets positively charged because the electrons and protons are interchanged
3.
4.
5. earthing of an electrical device is to keep the device safe from shock
6. short circuit is caused when a negative and positive electric wire meet each other..
7. every circuit is designed to bear a certain load of electricity. when more than designed load is put onto the circuit then it is known as overloading of the circuit.
8. always where non conductive shoes or plastic shoes. and never touch live wire directly with bare hands.
Answer:
1) while rubbing a body elctrons get ionised though they started moving from one body to another due to which one body gets negatively charged and another one gets positively charged!
2) while rubbing valence electrons starts moving from glass rod to another body in contact due to which no. of protons remains more than the no. of electrons in glass rod, that's how it gets positively charged!