Advertisements
Advertisements
Question
Answer in your own words.
How are charges generated?
Advertisements
Solution
Charges are generated in an object when the object loses or gains some electrons or when there is displacement between the positive and negative charges of an object. Methods of generating charges are:
- Rubbing: Explains how friction between insulators causes electron transfer, resulting in one object being positively charged and the other negatively charged.
- Conduction: Describes how contact with a charged body can transfer charge to an uncharged conductor.
- Induction: Illustrates how a nearby charged body can cause temporary separation of charges within a neutral body, resulting in a temporary charge.
RELATED QUESTIONS
Suggest three measures to protect ourselves from lightning.
Explain why it is not safe to go out with an umbrella when there is heavy rain, lightning or thunder.
What is the damage caused by lightning?
Write an answer to the following question in your own words.
What are the measures to prevent loss of life due to lightning?
During the construction of a building, the lightning conductor was left hanging in the air by mistake. Would the lightning conductor be still effective? Explain.
If the materials used for constructing a building were good conductors, do you think lightning will strike the building. Will the lightning conductor be still required to be installed in the building?
You might have observed on a dry day that when you touch the screen of a television or computer monitor (with picture tube), you get a slight shock. Why does it happen?
What precautions would you take if lightning occurs while you are outside the house?
During lightning and thunder, we should avoid standing in-ground and open spaces Why?
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
