Ncert- class6- science-Chapter 9: Electricity and Circuits 1 Welcome to your Ncert- class6- science-Chapter 9: Electricity and Circuits 1 1. In an open electric circuit the path of electric current is partially broken none of these the path of electric current is completely broken the path of electric current is not broken None 2. 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 Brighter than it was before Will not illuminate Dimmer than it was before The same brightness as it was before None 3. Two cells of each I5 V and third cell of 1 V arc connected in series. Find the battery voltage. 31 V 30 V None of these I5 V None 4. 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? 250 W Both 60W Neither None 5. Electric cells are used in All of the above Wrist watches Alarm clocks Cameras None 6. _______________ makes it possible to light our homes, roads, offices, markets and factories even after sunset. Electricity Food Magnets Motion of objects None 7. An electric cell has terminals. 8. If the switch is connected to a bulb and the battery is kept in the on position what do you observe? Cannot say The bulb will glow The bulb remains off None of the above None 9. In a circuit having one bulb, another bulb is added in series with another. Then the bulbs will : glow but less brigtly glow more brightly get fused Not glow None 10. The components required to make a simple series circuit to light a bulb are Wires and cell Cell and switch Bulb and wires Both B and C None 11. When the chemicals in the electric cell are used up, the electric cell stops working. Then, what should we do? We should keep using the same electric cell The electric cell has to be replaced with a new one All options are wrong Both options are correct None 12. Why are switches/keys used in a circuit? To control a device To save power To protect the system All of above None 13. Which among the following statements about an electric cell is false? An electric cell produces electricity from the chemicals stored inside it. It has a positive terminal. It has a neutral terminal. It has a negative terminal. None 14. Which is not a component of electric cell ? magnetic needle contact nut coil strip of iron None 15. The metal cap and metal disc on an electric cell are _________ and _________ respectively. Positive terminal' and 'Negative terminal' Negative terminal' and 'Negative terminal' Positive terminal' and 'Positive terminal' Negative terminal' and 'Positive terminal' None 16. Why shouldnt the two terminals of an electric cell be joined directly without a switch? It is dangerous None of them The chemicals in the electric cell get used up very fast and the cell stops working Electric cell will explode None 17. 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 all are correct only (iv) is correct (ii) and (iii) are correct None 18. Paheli is running short of connecting wires. To complete an electric circuit. she may use a Thick thread. Rubber pipe. Glass bangle. Steel spoon. None 19. The terminals of an electric cell are _________ and __________. None of them Positive and Positive Negative and Negative Positive and Negative None 20. The thin wire that gives off light is called the of the bulb. 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.
