Energy and Power in Electric Circuits (HSC SSCE Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What happens to energy in an electric circuit according to the Law of Conservation of Energy?
What happens to energy in an electric circuit according to the Law of Conservation of Energy?
It is transformed from one form to another
What happens when charged particles move through a battery?
What happens when charged particles move through a battery?
Their potential energy increases
What form of energy do electric motors primarily produce?
What form of energy do electric motors primarily produce?
Kinetic energy (movement)
Approximately what percentage of energy do traditional incandescent globes waste as heat?
Approximately what percentage of energy do traditional incandescent globes waste as heat?
90%
What does power measure in an electric circuit?
What does power measure in an electric circuit?
Rate at which energy is transformed
What is the fundamental equation for electrical power?
What is the fundamental equation for electrical power?
Which power formula should you use when you know voltage and resistance?
Which power formula should you use when you know voltage and resistance?
What are the three equivalent expressions for calculating power?
What are the three equivalent expressions for calculating power?
A device operates at 12 V with 25 Ω resistance. What is its power output?
A device operates at 12 V with 25 Ω resistance. What is its power output?
5.76 W
What is the typical efficiency range for electric kettles?
What is the typical efficiency range for electric kettles?
80-85%
