Electric power is given by

  • P = VI
  • P = IV
  • P =IVI
  • P =VI

D.

P =VI
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One ampere is equal to

  • 1 Coulomb/sec
  • 1 C x 1 s
  • 1 J x 1 C
  • 1 J/C


A.

1 Coulomb/sec
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The electrical appliances in the houses are connected with each other in

  • parallel combination

  • series

  • a combination of series and parallel circuits

  • none of the above


A.

parallel combination

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How is electricity much more useful than other forms of energy?

The advantages of electricity as compared to other forms of energy is as follows:

(i) Electricity can be readily transmitted over large distances with relatively small loss in energy.
(ii) Electricity can be easily converted to other forms of energy ike heat, light, sound, motion, etc.
(iii) electricity is the most convenient source of energy.

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Mention some important uses of electricity in our daily life.

Electricity playing an important role in modern society has a wide range of applications:

(i) Electricity is used in heating, lighting, cooking, operating fans, geysers, etc. in our houses, hospitals, hotels, office buildings, food storage plants.

(ii) Electricity is used in industries to run various types of machines.

(iii) In transportation to pull electric trains, trams, etc. 

(iv) Electricity is used for irrigation purposes in agriculture.

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