Ncert- class6- science-Chapter 9: Electricity and Circuits 1 Welcome to your Ncert- class6- science-Chapter 9: Electricity and Circuits 1 1. 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 2. An electric cell has terminals. 3. Paheli is running short of connecting wires. To complete an electric circuit. she may use a Steel spoon. Thick thread. Glass bangle. Rubber pipe. None 4. The components required to make a simple series circuit to light a bulb are Cell and switch Bulb and wires Both B and C Wires and cell None 5. The metal cap and metal disc on an electric cell are _________ and _________ respectively. Positive terminal' and 'Negative terminal' Negative terminal' and 'Positive terminal' Positive terminal' and 'Positive terminal' Negative terminal' and 'Negative terminal' None 6. Why are switches/keys used in a circuit? All of above To protect the system To control a device To save power None 7. In a circuit having one bulb, another bulb is added in series with another. Then the bulbs will : glow more brightly glow but less brigtly get fused Not glow None 8. Two cells of each I5 V and third cell of 1 V arc connected in series. Find the battery voltage. None of these 31 V I5 V 30 V None 9. The thin wire that gives off light is called the of the bulb. 10. Electric cells are used in Cameras All of the above Alarm clocks Wrist watches None 11. Why shouldnt the two terminals of an electric cell be joined directly without a switch? None of them Electric cell will explode It is dangerous The chemicals in the electric cell get used up very fast and the cell stops working None 12. The terminals of an electric cell are _________ and __________. Negative and Negative None of them Positive and Positive Positive and Negative None 13. Which is not a component of electric cell ? strip of iron coil contact nut magnetic needle None 14. Which among the following statements about an electric cell is false? It has a positive terminal. It has a negative terminal. An electric cell produces electricity from the chemicals stored inside it. It has a neutral terminal. None 15. If the switch is connected to a bulb and the battery is kept in the on position what do you observe? Cannot say None of the above The bulb remains off The bulb will glow None 16. In an open electric circuit the path of electric current is partially broken the path of electric current is completely broken the path of electric current is not broken none of these None 17. _______________ makes it possible to light our homes, roads, offices, markets and factories even after sunset. Motion of objects Magnets Electricity Food None 18. 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. (ii) and (iii) are correct only (i) and (ii) are correct only (iv) is correct all are correct None 19. 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 All options are wrong The electric cell has to be replaced with a new one None 20. 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 The same brightness as it was before Brighter than it was before Will not illuminate 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.
