| 1 | Give the Block diagram of the Transmission of Electricity from the power station to the consumer. |
| 2 | Give the reason for Power Transmission at a very high voltage (132 KV). |
| 3 | At the Generating Station, why is the electric power generated at 11 KV? |
| 4 | What is the meaning of "The frequency of alternating current is 50 Hz"? |
| 5 | What is the meaning of Live, Neutral and Earth wire and use of each wire in the circuit along with their colour coding? |
| 6 | Draw the diagram of the Ring System of the House Wiring with basic components and give the advantages of the Ring System. |
| 7 | What are the disadvantages of connecting the appliances in Series and the advantages of connecting them in Parallel? |
| 8 | What are the uses of Switch, Fuse, MCB, Earthing, 3-pin plug and 3-pin socket? |
| 9 | Why Fuse and Switch present in Live Wire? |
| 10 | Draw the diagram of Staircase wiring. |
| 11 | How Earthing prevents electric shock in the circuit and how it is useless if the Fuse is not present in the Live wire? |
| 12 | Draw a diagram of 3-pin plugs and a Socket. |
| 13 | State one circumstance, when one may get an electric shock from an electric gadget and one preventive measure to be provided with the gadget to avoid it. |
| 14 | Point out main differences between Overloading and Short-Circuiting. |
| 15 | Name the material which is used as the fuse wire. |
| 16 | Why is earthing of an electrical appliance necessary? |
| 17 | State the factors on which the resistance of a wire depends. Also, state how it is affected by the factors stated by you. |
| 18 | Why should switches always be connected with the live wire? |
| 19 | Explain the meaning of the statement ‘the power of an appliance is 100W’. |
| 20 | Define household units of electricity. |
| 21 | Why is the earth terminal in a plug made (i) thicker (ii) longer as compared to live or neutral terminals. |
| 22 | Define the materials used for making fuse wire. State two properties of material of fuse wire which make it suitable for use. |
| 23 | Explain the meaning of the statement ‘current rating of a fuse is 5A’. |
| 24 | Two fuse wires are rated 5A and 20A. Which of the two is (i) thicker (ii) longer |
| 25 | Draw the diagram of a dual control switch when the appliance is switched ‘ON’. |
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