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Describe two conducting materials which ...

Describe two conducting materials which are meant for specific uses.
Describe briefly the phenomenon of heat production by an electric current ?

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PRADEEP-ELECTRICITY-(Mock Test)Sec -A
  1. Out of the two, a toaster of 1 kW and an electric heater of 2 kW, whic...

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  2. An electric iron has a rating of 750 W, 220 V. Calculate : (i) curre...

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  3. A wire 1.0 m long, 0.2 mm in diameter, has a resistance of 10 Omega. C...

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  4. What is an electric circuit ? Distinguish between an open and a closed...

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  5. Describe two conducting materials which are meant for specific uses. ...

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  6. Discuss electric energy and electric power. Give their units.

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  7. What do you mean by rating of an electric appliance ? Illustrate with ...

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  8. Two metallic wires A and B (of the same material) are connected in par...

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  9. Calculate the equivalent resistance between the points A and B in the ...

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  10. If three resistors having resistances 2 Omega, 3 Omega and 5 Omega are...

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  11. A piece of wire having resistance R is cut into four equal parts. (i...

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  12. A piece of wire of resistance R is redrawn by pulling it until its len...

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  13. In the circuit diagram given in (Fig. 3.57), calculate : (a) the cur...

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  14. If you were asked to think of electricity, many favourable and unfavou...

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  15. (a) Why a bird perched on a high voltage wire is not killed by the cur...

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  16. (a) Water boils in an electric kettle in 15 minutes after being swiche...

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  17. (a) What is meant by saying that the potential difference two points i...

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  18. (a) Name an instrument that measures electric current in a curcuit. De...

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  19. You are making a snack for you some friends to help0 you get ready for...

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  20. Three incandescent bulbs of 100 W each are connected in series in an e...

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