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Explain the following : Why is the tungs...

Explain the following : Why is the tungsten used almost exclusively for filament of electric lamps?

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PSEB-Electricity-Exercise
  1. Two conducting wires of the same material and of equal length and equa...

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  2. How is a voltmeter connected in the circuit to measure potential diffe...

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  3. A copper wire has diameter 0.5 mm and resistivity of 1.6xx10^(-8) ...

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  4. The values of current I flowing in a given resistor for the correspond...

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  5. A battery 9 V is connected in series with resistors of 0.2Omega ,0.3Om...

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  6. How many 176 Omega resistors in parallel are required to carry 5A on a...

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  7. Show how you would connect three resistors, each of resistance 6omega,...

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  8. Show how you would connect three resistors, each of resistance 6omega,...

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  9. Several electric bulbs designed to be used on a 220 V electric supply ...

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  10. A hot plate of an electric oven connected to a 220 V line has two resi...

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  11. Compare this power used in the 2omega resistor in each of the followin...

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  12. Compare this power used in the 2omega resistor in each of the followin...

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  13. Two lamps, one rated 100 W at 220 V, and the other 20W at 220V, are co...

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  14. Which uses more energy, a 250 W TV set for 1 hour or a 1,200 W toaster...

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  15. An electric heater of resistance 8Omega draws 15 A from service mains ...

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  16. Explain the following : Why is the tungsten used almost exclusively fo...

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  17. Explain the following:Why are the conductors of electric heating devic...

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  18. Explain the following : Why is the series arrangement not used in dome...

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  19. Explain the following:How does the resistance of a wire vary with its ...

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  20. Explain the following : Why are copper and aluminium usually employed ...

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