Chapter 15
SOME NATURAL PHENOMENA
Select the correct option in Question 1 and 2.
1. Which of the following cannot be charged easily by friction?
(a) A plastic scale
(b) A copper rod
(c) An inflated balloon
(d) A woollen cloth.
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2. When a glass rod is rubbed with a piece of silk cloth the rod
(a) and the cloth both acquire positive charge.
(b) becomes positively charged while the cloth has a negative charge.
(c) and the cloth both acquire negative charge.
(d) becomes negatively charged while the cloth has a positive charge.
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3. Write T against true and F against false in the following statements.
(a) Like charges attract each other (T/ F)
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(b) A charged glass rod attract a charged plastic straw (T/ F)
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(c) Lightning conductor cannot protect a building from lightning (T/ F)
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(d) Earthquakes can be predicted in advance (T/F)
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4. Sometimes, a checking sound is heard while taking off a sweater during winters, Explain.
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5. Explain why a charged body loses its charge if we touch it with our hand.
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6. Name the scale on which the destructive energy of an earthquake is measured. An earthquake measures 3 on this scale. Would it be recorded by a seismograph? Is it likely to cause much damage.
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7. Suggest three measures to protect ourselves from lightning.
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8. Explain why a charged balloon is repelled by another charged balloon whereas an uncharged balloon is attracted by another charged balloon?
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9. Describe with the help of a diagram an instrument which can be used to detect a charged body.
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10 List three states in India where earthquakes are more likely to strike.
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11. Suppose you are outside your home and an earthquake strikes. What precaution would you take to protect yourself?
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12. The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella? Explain.
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Type- Ankur Moni Nath
Post ID : DABP004837
