Advertisements
Advertisements
Question
An Electric bulb is marked 100 W, 230 V. What find the energy consumed by the bulb in one hour.
Solution
Energy consumed in Is is 100 J.
∴ Energy consumed in hour = 100 × 60 × 60J = 360000 J.
APPEARS IN
RELATED QUESTIONS
Name two gases which are filled in filament type electric light bulbs.
In a filament type light bulb, most of the electric power consumed appears as:
(a) visible light
(b) infra-red-rays
(c) ultraviolet rays
(d) fluorescent light
Name the S.I. unit of electrical energy. How is it related to Wh?
List the names of three electrical gadgets used in your house. Write their power, voltage ratingand approximate time for which each one is used in a day. Hence find the electrical energyconsumed by each in a day.
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 iron rated 750 W is operated for 2 hours/day. How much energy is consumed by the electric iron for 30 days?
What does the unit kilowatt hour measure? Define it.
State three factors on which the heat produced in a metallic wire due to passage of current in it depends.
Why is heating coil wound in the form of a helix in electric stove?