Ncert- class6- science-Chapter 9: Electricity and Circuits 1 Welcome to your Ncert- class6- science-Chapter 9: Electricity and Circuits 1 1. The thin wire that gives off light is called the of the bulb. 2. The terminals of an electric cell are _________ and __________. Positive and Negative Positive and Positive None of them Negative and Negative None 3. Three 100 W light bulbs are connected in series to a 220 V power source.If two of the light bulbs are replaced by 60 W bulbs the brightness of the remaining 100 W bulb is Dimmer than it was before Will not illuminate Brighter than it was before The same brightness as it was before None 4. An electric cell has terminals. 5. In an open electric circuit the path of electric current is completely broken none of these the path of electric current is partially broken the path of electric current is not broken None 6. The metal cap and metal disc on an electric cell are _________ and _________ respectively. Positive terminal' and 'Negative terminal' Negative terminal' and 'Negative terminal' Negative terminal' and 'Positive terminal' Positive terminal' and 'Positive terminal' None 7. When the chemicals in the electric cell are used up, the electric cell stops working. Then, what should we do? Both options are correct We should keep using the same electric cell The electric cell has to be replaced with a new one All options are wrong None 8. _______________ makes it possible to light our homes, roads, offices, markets and factories even after sunset. Magnets Food Motion of objects Electricity None 9. In a circuit having one bulb, another bulb is added in series with another. Then the bulbs will : get fused glow more brightly Not glow glow but less brigtly None 10. Paheli is running short of connecting wires. To complete an electric circuit. she may use a Glass bangle. Thick thread. Rubber pipe. Steel spoon. None 11. Bulbs of rating 60W, 220V and 250W, 220V are connected in series and their combination is connected to 440 V supply. Which bulb will fuse? Both 250 W 60W Neither None 12. Two cells of each I5 V and third cell of 1 V arc connected in series. Find the battery voltage. I5 V 31 V 30 V None of these None 13. Which is not a component of electric cell ? contact nut coil strip of iron magnetic needle None 14. Why are switches/keys used in a circuit? To save power All of above To protect the system To control a device None 15. If the switch is connected to a bulb and the battery is kept in the on position what do you observe? None of the above Cannot say The bulb remains off The bulb will glow None 16. When a switch is in OFF position,i) Circuit starting from the positive terminal of the cell stops at the switch.ii) Circuit is open.iii) No current flows through it.iv) Current flows after some time.Choose the combination of correct answer from the following. only (i) and (ii) are correct (ii) and (iii) are correct all are correct only (iv) is correct None 17. The components required to make a simple series circuit to light a bulb are Both B and C Wires and cell Cell and switch Bulb and wires None 18. Electric cells are used in Wrist watches All of the above Alarm clocks Cameras None 19. Why shouldnt the two terminals of an electric cell be joined directly without a switch? None of them The chemicals in the electric cell get used up very fast and the cell stops working It is dangerous Electric cell will explode None 20. Which among the following statements about an electric cell is false? It has a negative terminal. It has a positive terminal. An electric cell produces electricity from the chemicals stored inside it. It has a neutral terminal. None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
