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If the mains supply is at 230 V, calculate the maximum number of 36 W tube lights that can be safely used in this circuit. 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current (a) Explain why, it is more dangerous to touch the live wire of a mains supply rather than the neutral wire. (b) Why is it safe for birds to sit on naked power lines fixed atop tall electric poles? 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current What is the main difference between the wiring of an electric bulb and a socket for using an electric iron in a domestic electric circuit? What is the reason for this difference? 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current An electric kettle rated as 1200 W at 220 V and a toaster rated at 1000 W at 220 V are both connected in parallel to a source of 220 V. 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current Which of the following circuits will still be dangerous even if the fuse blows off and electric iron stops working during a short circuit? 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current A vacuum cleaner draws a current of 2 A from the mains supply. (a) What is the appropriate value of the fuse to be fitted in its circuit? 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current Three appliances are connected in parallel to the same source which provides a voltage of 220 V. A fuse connected to the source will blow if the current from the source exceeds 10 A. 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current An air-conditioner of 3.2 kW power rating is connected to a domestic electric circuit having a current rating of 10 A. The voltage of power supply is 220 V. What will happen when this air-conditioner is switched on? Explain your answer. 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current Draw a labelled diagram to show the domestic electric wiring from an electric pole to a room. Give the wiring for a bulb and a three-pin socket only. (b) State two hazards associated with the use of electricity. 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current (a) Why are fuses fitted in the fuse box of a domestic electricity supply? (b) What device could be used in place of the fuses? 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current (a) What current is taken by a 3 kW electric geyser working on 240 V mains? (b) What size fuse should be used in the geyser circuit? 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current What is the function of an earth wire? Why is it necessary to earth the metallic bodies of electrical appliances? 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current An electric iron is rated at 230 V, 750 W. Calculate (i) the maximum current, and (ii) the number of units of electricity it would use in 30 minutes. (b) Which of the following fuse ratings would be suitable for this electric iron? 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current Explain the importance of using in a household electric circuit (i) fuse, and (ii) earthing wire. 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current When does a fuse cut off current? How does it do it? (b) What is the maximum number of 60 W bulbs that can be run from the mains supply of 220 volts if you do not want to overload a 5 A fuse? 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current Distinguish between the terms ‘overloading’ and ‘short-circuiting‘ as used in domestic circuits. 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current What type of electric fuse is used in electrical appliances like car stereos? Explain with the help of a labelled diagram. 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current (a) Of what substance is the fuse wire made? Why? (b) Explain why, a copper wire cannot be used as a fuse wire. 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current A fuse should always be placed in the……. wire of a mains circuit. (b) The earth wire should be connected to the……. of an appliance. 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current How should the electric lamps in a building be connected so that the switching on or off in a room has no effect on other lamps in the same building? 4 years ago Satkriti Roao class 10 lakhmir singh magnetic effects electric current Page 3 / 5 Prev 1 2 3 4 5 Next Share: Super Globals Requests: Server: Options and Features route: community use_home_url: url: https://eanshub.com/community/ pageid:187 default_groupid: 3 2022 How Can We Help? 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