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