EASY
8th CBSE
IMPORTANT
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If a charged plastic straw is brought near another uncharged plastic straw, what will happen?
 

Important Questions on Some Natural Phenomena

EASY
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 15 - Some Natural Phenomena>VERY SHORT ANSWER QUESTIONS>Q 14

The aluminum strips in an electroscope as shown in figure are replaced by plastic strips and a charged body is brought in contact with the metal clip. What will happen?

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EASY
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 15 - Some Natural Phenomena>VERY SHORT ANSWER QUESTIONS>Q 15
Plastic straws A and B are rubbed with dry cotton cloth. What will happen if they are brought near each other?
MEDIUM
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 15 - Some Natural Phenomena>SHORT ANSWER QUESTIONS>Q 16
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.
 
MEDIUM
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 15 - Some Natural Phenomena>SHORT ANSWER QUESTIONS>Q 17
If air and cloud were good conductors of electricity, do you think lightning could occur? Explain.
MEDIUM
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 15 - Some Natural Phenomena>SHORT ANSWER QUESTIONS>Q 18

Identify the lightning conductor and the copper plate in figure.

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MEDIUM
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 15 - Some Natural Phenomena>SHORT ANSWER QUESTIONS>Q 19
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?
 
MEDIUM
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 15 - Some Natural Phenomena>SHORT ANSWER QUESTIONS>Q 20
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?

MEDIUM
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 15 - Some Natural Phenomena>SHORT ANSWER QUESTIONS>Q 21
Explain how does lightning conductor protects a building from getting struck by lightning.