Question

CHARGE AND LIGHTNING: (a) Inflate two balloons. Hang them in such a way that they do not touch each other (Fig. 15.1). Rub both the balloons with a woollen cloth and release them. Now let us repeat this activity with the used pen refills. Rub one refill with polythene. Place it carefully in a glass tumbler using the tumbler as a stand (Fig. 15.2). Rub the other refill also with polythene. Bring it close to the charged refill. Be careful not to touch the charged end with your hand. In this activity we have brought close together the charged objects that were made of the same material. (b) Rub a refill and place it gently in a glass tumbler as before (Fig. 15.3). Bring an inflated charged balloon near the refill and observe. The above activity shows us that charge is produced by rubing the objects. The same phenomenon also observes in clouds. The charge is produced when clouds rub each other. When the magnitude of the accumulated charges becomes very large it srike on the earth in the form of lightning. Q1. What happens when we rub balloons with woollen cloth? * Balloons will get smaller in size. The balloons will accuire charge. The balloons will be discharged The colour of balloons will be changed. Q2. Why do balloons repel each other after rubbing with woolon cloth? * The balloons acquire like charges The balloons acquire unlike charges. The balloons acquire magnetic property Balloons are moving away because of the wind. Q3. What happens when we rub the refill with the polythene and place it near the refill in tumbler? * The refills will repel each other The refills will attract each other. There will be sparking None of these. Q4. What do you observe in activity (b)? * Balloon attracts the refill, Balloon repels the refill. Balloon will burst. Refil gets discharge Q5. Which of the following statement is correct? . * Like charges always attract each other. Unlike charges always attract each other. A charged glass rod does not attract a charged plastic straw Lightning conductor cannot protect a building from lightning​

Answer 1

Answer:

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Explanation: