aliensbrain
  • Home
  • Study
  • Quizzes
  • 🎤AI Practicefree
  • Notebooks
  • Community
  • Sign in
  • Energy and Power
  • An LED light uses 150 J of energy in 3 seconds. What is i...
Multiple choice

An LED light uses 150 J of energy in 3 seconds. What is its power?

  1. 50 watts

  2. 30 watts

  3. 10 watts

  4. 450 watts

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Power is calculated as Energy divided by time (P = E/t). 150 J / 3 s = 50 Watts.

Keep practicing — related questions

  • A light bulb uses 500 J of energy in 5 seconds. What is its power? (Remember: P = E ÷ t)
  • A body spends 20 joules of energy in 5 second . What is its power?
  • The energy used by the brain is enough to light a ___ watt light bulb.
  • Noise with double-sided power spectral density on K over all frequencies is passed through a RC low pass fi...
  • Microbial fuel cells are considered a source of sustainable energy. Why? 1. They use living organisms ass c...
  • Match the following fibres with their uses and choose the correct option from the following. ||| |---|---| ...
  • Which of the following statements is/are true? (a) CNG is a clean fuel. (b) CNG can be supplied through pip...
  • The unit 5 of which of the following atomic power stations became the second longest running reactor in the...
Play the full quiz 🎤 Practise this topic out loud

Practice this topic

  • Power, Energy, and Efficiency (463 questions)
Advertisement
© Aliensbrain | all rights reserved
  • About
  • Contact
  • Terms and Condition
  • Privacy Policy