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