Advertisements
Advertisements
Question
Explain how lightning takes place.
Solution
During the development of a thunderstorm, the air currents move in upward direction while the water droplets move in downward direction. These movements cause separation of charges. The positive charges collect near the upper edges of the clouds and negative charges collect near the lower edges of the clouds.
Accumulation of positive charges near the ground also takes place. When the magnitude of collected charges become large, the air cannot resist their flow and as a result, negative and positive charges meet producing streaks of bright light and sound, called lightning.
APPEARS IN
RELATED QUESTIONS
Answer in your own words.
Why do farmers stick an iron staff into the ground while working in the field in rainy conditions?
How will you create awareness to prevent lightning?
Write an answer to the following question in your own words.
What are the measures to prevent loss of life due to lightning?
Electric current is to be passed from one body to another. For this purpose, the two bodies must be joined by
If air and cloud were good conductors of electricity, do you think lightning could occur? Explain.
Identify the lightning conductor and the copper plate in figure.
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 thunderstorms, the air is moving ______ rapidly. This air moves rapidly.
Huge quantities of electricity are discharged in lightning flashes and temperatures of over ______°C or more can be reached.
______ extreme heat will vaporize the water inside a tree, creating steam that may burn out the tree.
How does thunder take place?
Sometimes lighting may be seen before the thunder is heard. Why?
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage. Assertion: It is safer to stand under a tall | tree during lightning.
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
