Advertisements
Advertisements
Question
A bulb of power 60 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.
Advertisements
Solution
Given, P = 60 W,
t = 12.5 × 30 = 375 h
Electric energy consumed = power × time
= 60 W × 375 h
= 22500 W
= `22500/1000`
= 22.5 kWh
APPEARS IN
RELATED QUESTIONS
Name the S.I. unit of electrical energy. How is it related to Wh?
How do kilowatt and kilowatt-hour differ?
When a current I flows through a resistance R for time t, the electrical energy spent is given by ______.
An electric toaster draws current 8 A in a circuit with source of voltage 220 V. It is used for 2 h. Find the cost of operating the toaster if the cost of electrical energy is ₹ 4.50 per kWh.
Find out the energy conversion that takes place in the following.
Speaker ______.
What are the different forms of energy?
Electric eel is a ______.
Electric eel can generate ______.
Name the particles of atom?
What are the different ways electricity can be generated?
Choose the odd one:
Units of electrical energy are ______
Name the physical quantity which is measured in kWh.
Name the physical quantity which is measured in Wh.
