a 12. What are the various possibilities for the bulb not to glow in an electric circuit? 13. Give reasons: a. Electricians are advised to wear rubber gloves while working on electrical devices. b. Electric switches and boards are made up of plastic. c. One should not touch switches with wet hands. ( 14. What will happen if both the terminals of cell are directly connected without connecting them through switch and a bulb? 15. Filament of an electric bulb is made up of tungsten and not any other material. Why? ( 16. Your brother has made a battery-operated torch using two cells and has come to you how he may make the torch more powerful. What would you advise him? 17. What kind of cells would you use in the following cases? a. Car b. Transistor radio c. Hearing aid 18. Why are solar cells used as a source of power in satellites? 19. Instead of plastic, can the electric wires be covered with aluminium foil?
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1) The bulb is faulty. 2) The wires are faulty. 3) The wires are not connected with bulb holder properly. 4) The bulb is not attached with the bulb holder properly
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