C. One should not touch switches withi wetu14. What will happen if both the terminals of cell are directly connected withoutconnecting 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 askyou 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. Carb. Transistor radioc. Hearing aid18. 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?

C. One should not touch switches withi wetu14. What will happen if b

1.	C. One should not touch switches withi wetu14. What will happen if both the terminals of cell are directly connected withoutconnecting 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 askyou 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. Carb. Transistor radioc. Hearing aid18. 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?
Answer» 14) they START sparking15 ) it have high melting point tungsten is covered by glass so it not get o² so it not get fire only glow16 )use only copper wire ,power of bulb is ACCORDING to battery17)a.lead , chemical ACID batteryb.cell of carbon electrodec.small watch battery18) to minimize the use of fuel we use solar cells19)no because aluminium is good conducter