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Types of Electric Circuits Series and Parallel

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Question

Give reason: For electric power transmission, copper or aluminium wire is used. [2 Marks]

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Solution

For electric power transmission, Copper or Aluminium wire is used because they provide low resistance path to the flow of current. Thus, the power loss in the low resistance transmission wire will be less.
[2 Marks]

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Q. Give Scientific reasons.
a. Tungsten metal is used to make a solenoid type coil in an electric bulb.
b. In the electric equipment producing heat e.g. iron, electric heater, boiler, toaster etc, an alloy such as Nichrome is used, not pure metals.
c. For electric power transmission, copper or aluminium wire is used.
d. In practice the unit kWh is used for the measurement of electrical energy, rather than joule.

Q. Explain the following:
(a) Why is tungsten used almost exclusively for filament of electric lamps?
(b) Why are copper and aluminium wires usually used for electricity transmission?
(c)Why is nichrome alloy used for making elements of electric irons?

Q. Give scientific reason:
For electric power transmission,copper or aluminium wire is used.

Q. Give reason -
For electric power transmission, copper or aluminium wire is used.

6. Why copper or aluminium wires are used in electricity transmission?

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Types of Electric Circuits Series and Parallel

Standard VII Physics

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