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संबंधित प्रश्न
An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.
A bulb is rated as 250 V; 0.4 A. Find its : (i) power, and (ii) resistance.
Distinguish between kilowatt and kilowatt-hour.
A bulb of 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.
State the S.I. units of electrical power and electrical energy.
(i) Define the household unit of electricity.
(ii) What is the voltage of the electricity that is generally supplied to a house?
An electric bulb of resistance 500 Ω draws current 0.4 A from the source. Calculate:
- the power of bulb and
- the potential difference at its end.
What is the energy conversion when an electric current passes through a metallic wire?
Household wiring for lamp connections can either be done in parallel or in series.Which one would you prefer? Give a reason for your answer.
What changes in energy occur in an electric heater?
State other bigger units of electric power and express them in watt.
