Ncert- class6- science-Chapter 9: Electricity and Circuits 2 Welcome to your Ncert- class6- science-Chapter 9: Electricity and Circuits 2 1. What is false in an ideal Electrical Circuit EMF of cell remains same Resistance of connecting wires is zero Wires are heated Internal Resistance of battery is zero None 2. Which of the following devices can be used to break an electric circuit: Switch Bulb Cell None of these None 3. What type of energy transformation occurs in a dry cell ? electrical to light energy electrical to thermal energy chemical to electrical energy potential to electrical energy None 4. Substances that do not allow free flow of charge through them are called 5. The path along which electric current flows is called resistor insulator electric circuit conduct None 6. If we touch a naked current carrying wire, we get a shock. This is because our body is a : source of electricity both B&C conductor of electricity insulator of electricity None 7. Which one of the following will not conduct electricity? acidified water CuSO4 solution solid NaCl graphite None 8. Nidhi has two bulbs connected across two cells in a simple circuit. How can she make the bulbs glow dim? Replace one cell wtih a piece of wire Replace one bulb with another cell Replace one bulb with a piece of wire Replace one cell with a piece of chalk None 9. What happens to a circuit when the switch is off? The circuit is complete The circuit is now an open circiut Electricity flows continuously Electricity flows discontinuously None 10. In which circuit will the bulb or bulbs glow the brightest? A simple circuit with two bulbs and one cell A simple circuit with one bulb and two cells A simple circuit with two bulbs and two cells A simple circuit with one bulb and one cell None 11. Why is a fuse used in an electrical appliance? To earth the appliance To change the current rating of the appliance To change the efficiency of the appliance To protect the appliance and its cable None 12. Some matters do not allow the electricity to pass through it. What is called a matter which does not allow the electricity to pass though it? Semiconductor Conductor All of these Insulator None 13. Human body is a poor conductor of electricity good conductor of electricity semiconductor good insulator None 14. A bulb rated 240 V, 100 W is connected to a 120V supply. What can be inferred? The bulb lights up to normal brightness The bulb lights up but it is dim The bulb lights up initially and then it fuses The bulb fuses None 15. Conducting wires in a circuit are usually made up of Fiber Magnet Copper Iron None 16. What happens to a circuit when the switch is off? Electricity flows continuously Electricity flows discontinuously The circuit is complete There is a gap in the circuit None 17. Electric energy is produced from the ............ stored inside the cell. Transistor Chemicals None of these. Insulator None 18. Substances which allow electricity to pass through them are known as Electrical conductors Both conductors & insulators None of these Electrical insulators None 19. The substance which allows electric current to flow through it is called Semiconductor Conductor None of these Insulator None 20. Electric current cannot flow through None of these Wood Copper Silver 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.
