Which uses more energy, a 250 W TV set in 1 hr, or a 1200 W toaster in 10 minutes?
Solution and Explanation
Energy consumed by an electrical appliance is given by the expression, H= Pt
Where,
Power of the appliance = P
Time = t
Energy consumed by a TV set of power 250 W in 1 h = 250 ×3600 = 9 ×105 J
Energy consumed by a toaster of power 1200 W in 10 minutes = 1200 ×600
Energy consumed by a toaster of power 1200 W in 10 minutes = 1200 ×600 = 7.2×105 J
Therefore, the energy consumed by a 250 W TV set in 1 h is more than the energy consumed by a toaster of power 1200 W in 10 minutes.
Top Questions on Electric Power
- One kilowatt hour is equal to
- AP POLYCET - 2025
- Physics
- Electric Power
- The power of an electric motor that takes \( 5 \, A \) electric current from a \( 220 \, V \) transmission line is:
- AP POLYCET - 2025
- Physics
- Electric Power
- A bulb rated 60 W operates for 2 hours. How much energy does it consume in this time?
- VITEEE - 2025
- Physics
- Electric Power
- Electric power is the product of current and
- AP POLYCET - 2024
- Physics
- Electric Power
- The ratio of powers of two motors is \(\frac{3\sqrt x}{\sqrt x+1}\), that are capable of raising 300 kg water in 5 minutes and 50 kg water in 2 minutes respectively from a well of 100 m deep. The value of x will be
- JEE Main - 2023
- Physics
- Electric Power
Questions Asked in CBSE X exam
- "We have to use a planned and sustainable manner to conserve our minerals." Support the statement.
- CBSE Class X - 2025
- Minerals and Energy Resources
- The angles of depression of the top and the foot of a 9 m tall building from the top of a multi-storeyed building are \(30^\circ\) and \(60^\circ\) respectively. Find the height of the multi-storeyed building and the distance between the two buildings.
(Use \(\sqrt{3} = 1.73\))- CBSE Class X - 2025
- Trigonometry
- How did the trade policy implemented in 1991 stimulate globalization in India? Explain with examples.
- CBSE Class X - 2025
- Globalisation and Indian Economy
You are Anuradha/Ashish, residing at 45, Westwood Street, Nainital. After being inspired by a billboard advertisement for a seaside resort promoting relaxation and rejuvenation, you are interested in planning a family getaway.
Let the waves of the water drench you with the ultimate bliss of being alive ! Book a stay with us and experience the best holiday ever !
Write a letter (100–120 words) to the Resort Manager requesting details about the costs, room options, nearby attractions and available activities. Please include any additional necessary information for planning the trip.
- CBSE Class X - 2025
- Writing Skills
- Why was the Indian subcontinent significant to trade networks before European intervention? Explain.
- CBSE Class X - 2025
- The Making of a Global World
Concepts Used:
Electric Power
Power is defined as the rate of doing work. Electric power is the rate at which electrical energy is transferred through an electric circuit, i.e. the rate of transfer of electricity. The symbol for Electric Power is ‘P’. SI unit of electric power is Watt.
Electric Power Formula
P = VI
From Ohm's Law, V = IR
Hence, Power can also be expressed as P = I2R