Electric Energy: Consumption and Conservation — Important Questions
Kerala Board · Class 10 · Physics
44 important questions from Electric Energy: Consumption and Conservation for Kerala Board Class 10 Physics, with answers.
Interactive on Super Tutor
Studying Electric Energy: Consumption and Conservation? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for important questions and more.
Free trial, no card needed.
Important Questions from Electric Energy: Consumption and Conservation
According to Joule's law, the heat produced in a conductor is directly proportional to:
Show answer
Square of current (I²), Resistance (R), Time (t)
Joule's law states: H = I²Rt. Heat is directly proportional to the square of current, resistance, and time for which current flows.
Which of the following equations represent electric power correctly?
Show answer
P = I²R, P = V²/R, P = VI
The three correct equations for electric power are: P = I²R, P = V²/R, and P = VI. These are derived using Ohm's law and the definition of power.
What is one kilowatt-hour (1 kWh) equal to in joules?
Show answer
3.6 × 10⁶ J
1 kWh = 1000 W × 3600 s = 3,600,000 J = 3.6 × 10⁶ J. This is the commercial unit of electric energy.
A 100 W bulb operates for 10 hours. Calculate the energy consumed in kWh.
Show answer
1 kWh
Energy = Power × Time E = 100 W × 10 h = 1000 Wh = 1 kWh Or using formula: E = (Power in watts × time in hours)/1000 = (100 × 10)/1000 = 1 kWh
+40 more questions on Electric Energy: Consumption and Conservation (Kerala Board Class 10 Physics)
Practise AllFrequently Asked Questions
What are the important topics in Electric Energy: Consumption and Conservation for Kerala Board Class 10 Physics?
How many important questions are there in Electric Energy: Consumption and Conservation?
Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Electric Energy: Consumption and Conservation
For serious students
Get the full Electric Energy: Consumption and Conservation chapter — start free.
Quizzes, flashcards, an AI doubt solver and a study plan for Kerala Board Class 10 Physics. Free to start, no card needed.