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 completely broken the path of electric current is not broken the path of electric current is partially broken none of these None 2. Which is not a component of electric cell ? strip of iron coil contact nut magnetic needle None 3. The thin wire that gives off light is called the of the bulb. 4. The terminals of an electric cell are _________ and __________. Negative and Negative Positive and Negative None of them Positive and Positive None 5. Two cells of each I5 V and third cell of 1 V arc connected in series. Find the battery voltage. I5 V 30 V 31 V None of these None 6. 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 Neither Both 60W None 7. 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 8. The metal cap and metal disc on an electric cell are _________ and _________ respectively. Positive terminal' and 'Positive terminal' Positive terminal' and 'Negative terminal' Negative terminal' and 'Negative terminal' Negative terminal' and 'Positive terminal' None 9. Electric cells are used in Alarm clocks Cameras Wrist watches All of the above None 10. 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 all are correct only (iv) is correct None 11. An electric cell has terminals. 12. Why are switches/keys used in a circuit? All of above To save power To control a device To protect the system None 13. _______________ makes it possible to light our homes, roads, offices, markets and factories even after sunset. Motion of objects Magnets Electricity Food None 14. 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 15. Paheli is running short of connecting wires. To complete an electric circuit. she may use a Glass bangle. Rubber pipe. Steel spoon. Thick thread. None 16. 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 The same brightness as it was before Will not illuminate Brighter than it was before Dimmer than it was before None 17. If the switch is connected to a bulb and the battery is kept in the on position what do you observe? The bulb remains off The bulb will glow None of the above Cannot say None 18. 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 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 Electric cell will explode It is dangerous None 20. The components required to make a simple series circuit to light a bulb are Wires and cell Both B and C Cell and switch Bulb and wires 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.
