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Question
Define the term kilowatt - hour and state its value in S.I. unit.
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Solution
One kilowatt-hour (kWh) is the electrical energy consumed by an electrical appliance of power 1 kW when it is used for one hour.
Its value in SI unit is 1 kWh = 3.6 × 106 J
RELATED QUESTIONS
One coulomb charge is equivalent to the charge contained in:
(a) 2.6 × 1019 electrons
(b) 6.2 × 1019 electrons
(c) 2.65 × 1018 electrons
(d) 6.25 × 1018 electrons
Which particles constitute the electric current in a metallic conductor?
Find the effective resistance in the following circuit diagrams (Fig.):
Unit of electric power may also be expressed as
Problems for practice:
If 3A current flows through a circuit, then convert the current in terms of a milliampere.
The number of electrons constituting a 1-coulomb charge is ______.
Calculate the current in a wire if a charge of 1500 coulomb flows through it in 5 minutes.
