Electric Power and EnergyPractice Questions & MCQs
Practice Electric Power and Energy questions from Electricity (Class 10 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Electric Power and EnergyQuiz - Solve & Score
Q1. Which expression for power uses only current and resistance?
- A.P = I^2 R
- B.P = VI
- C.P = V^2 / R
- D.P = V/I
Answer: A. P = I^2 R
Q2. Which appliance generally has the highest power rating?
- A.a small fan
- B.a mobile phone charger
- C.an electric geyser/heater
- D.an LED night lamp
Answer: C. an electric geyser/heater
Q3. Which formula would you use to find power if only V and R are known?
- A.P = V^2 / R
- B.P = I^2 R
- C.P = I / V
- D.P = V I
Answer: A. P = V^2 / R
Which principle settles this? Electric power P = V*I = I^2*R = V^2/R, and energy E = P*t; pick the version matching the data and substitute the listed values => P (or E) drops out as a single number; hence the answer = P = V^2 / R. Does that line up with one of the options? Yes - Correct. And the rest? option B) 'P = I^2 R' fails since That needs the current, not given here; option C) 'P = I / V' fails since That is not a power formula. Pick: A) P = V^2 / R.
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Where can I practise Electric Power and Energy questions for Class 10 Science?
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Are these Electric Power and Energy questions important for the exam?
Yes. These Electric Power and Energy important questions follow the Science exam pattern (CBSE Boards, plus JEE and NEET foundation), so they help with both school and competitive prep.
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Every Electric Power and Energy question on RankByte comes with the correct answer and a full step-by-step solution, so you learn the concept instead of just guessing.