Maharashtra Board Class 7 Science Solution Chapter 8 – Static Electricity
Balbharati Maharashtra Board Class 7 Science Solution Chapter 8: Static Electricity. Marathi or English Medium Students of Class 7 get here Static Electricity full Exercise Solution.
Std |
Maharashtra Class 7 |
Subject |
General Science Solution |
Chapter |
Static Electricity |
(1) (a) There is always repulsion between like charges.
(b) Displacement of negative charge is responsible generation of electric charge in an object.
(c) A lightning conductor is made of a Copper strip.
(d) Copper does not get electrically charged easily by rubbing.
(e) There is always altercation when opposite electric charge come near each other.
(f) A charged object can be detected with an electroscope.
(2) The science behind lightning is complicated. lighting is electrostatic discharge through a tall building or tree. If we get out with an umbrella during lighting, the discharged electricity may pass through the umbrella and the person may electrocuted. Umbrella have a stick which is made up of metal. And we know metal is good conductor of electricity.
(3) (i) We can protect our self from lightning avoiding take shelter under trees, avoiding get out of room during lighting.
(ii) The science behind lightning or lighting strike is complicated. Air and clouds rub against each other in the sky, and the upper part of the clouds becomes positively charged and the lower sides become negatively charged automatically.
(e) Lightning is charging of cloud by rubbing each other. Cloud could not achieved charge every day. So, lightning is not every day during the rainy season.
(4) The characteristics of static electric charge: There exist two type of charges, positive and negative positive is change by proton and negative is charge by electron. They are attracted to each other.
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