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The two types of electric charges are: Positive and Negative
2. Instrument is Electroscope
Useful effects of lightening :
lightning converts nitrogen into its oxide which dissolves with water and comes down as rain. this helps in nitrogen fixation of plant. 2.It creates ozone which protects us from the harmful ultraviolet rays of the sun.
Harmful effects :
1) Lightining can cause death of living organisms living in a particular area. 2) It may lead to intense heat and electrical damages. 3) When lightining strikes on a tree it causes fire.
Properties :
Similar electric charges tend to repel each other. Opposite electric charges tend to attract each other.
A body can be electrically charged by anyone of the following three ways:
Friction
Contact
Electrostatic induction
2. Instrument is Electroscope
Useful effects of lightening :
lightning converts nitrogen into its oxide which dissolves with water and comes down as rain. this helps in nitrogen fixation of plant. 2.It creates ozone which protects us from the harmful ultraviolet rays of the sun.
Harmful effects :
1) Lightining can cause death of living organisms living in a particular area. 2) It may lead to intense heat and electrical damages. 3) When lightining strikes on a tree it causes fire.
Properties :
Similar electric charges tend to repel each other. Opposite electric charges tend to attract each other.
A body can be electrically charged by anyone of the following three ways:
Friction
Contact
Electrostatic induction
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Answer:
Types - Positive, Negative
Instrument used - Electroscope
Methods - By rubbing- Frictional charging (Electrostatic Force)
By keeping- Induction charging
By touching- Conduction charging
Lightning - Harmful -
May kill people/ cause cardiac arrests, Setting buildings on fire.
- Useful -
Nitrogen fixation, Creation of ozone layer, Vaporizing antennas
Properties - Opposite charges attract
Explanation:
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