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Why are copper and aluminium wires, usua...

Why are copper and aluminium wires, usually employed for electricity transmission ?

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They are extremely good conductors having a low value of resistivity.
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OSWAAL PUBLICATION-ELECTRICITY-TOPIC-2 ( Short Answer Type Questions -II )
  1. Why are coils of electric toasters and electric irons are made of an a...

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  2. Why is series arrangement not used for domestic circuits?

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  3. Why are copper and aluminium wires, usually employed for electricity t...

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  4. What is an electric fuse ? What is its role in the electric circuits ...

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  5. Define electric power. A device of resistance R is connected across a ...

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  6. An electric bulb is connected to a 220 V generator. The current is 0.5...

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  7. State one difference between Kilowatt and Kilowatt hour. Express 1 kWh...

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  8. A bulb is rated 5V, 500 mA. Calculate the rated power and resistance o...

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  9. Define electric power. An electric motor is rated at 2kW. Calculate th...

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  10. State Ohm's Law. Draw a circuit diagram to verify this law indicating...

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  11. Give reason for the following : Why are copper and aluminium wires u...

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  12. Explain the following Why is tungsten used almost exclusively for fi...

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  13. Give reason for the Why ie lead-tin alloy used for fuse wires ?

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  14. V-1 graph for a conductor is as shown in figure. (i) What do yo...

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  15. Show four different ways in which three resistors of Rohm each may be ...

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  16. Can you run electric geysor with power rating 2 kW, 220 V on a 5 A lin...

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  17. a] Derive an expression for the equivalent resistance of three resisto...

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  18. Electrical reslstivities of some substances, In ohm- meter, at 20^(@) ...

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  19. Electrical reslstivities of some substances, In ohm- meter, at 20^(@) ...

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