Electric Power and Efficiency

Please provide a rating, it takes seconds and helps us to keep this resource free for all to use

The following physics revision questions are provided in support of the physics tutorial on Electric Power and Efficiency. In addition to this tutorial, we also provide revision notes, a video tutorial, revision questions on this page (which allow you to check your understanding of the topic) and calculators which provide full, step by step calculations for each of the formula in the Electric Power and Efficiency tutorials. The Electric Power and Efficiency calculators are particularly useful for ensuring your step-by-step calculations are correct as well as ensuring your final result is accurate.

Not sure on some or part of the Electric Power and Efficiency questions? Review the tutorials and learning material for Electric Power and Efficiency

Electrodynamics Learning Material

Tutorial ID	Title	Tutorial	Video Tutorial	Revision Notes	Revision Questions
15.6	Electric Power and Efficiency

Electric Power and Efficiency Revision Questions

1. The power produced by the battery in figure 1 is P1. The power produced by the battery in figure 2 is P2. What is the ratio

1. 1/2
2. 2
3. 1/4
4. 4

Reveal AnswerCorrect Answer: D

2. What is the power rating of the lamp M in watts?

1. 10
2. 12
3. 14
4. 16

Reveal AnswerCorrect Answer: B

3. What is the energy in kWh consumed in one hour by a 20 Ω resistor connected to a 220 V electric source?

1. 20
2. 2.20
3. 8.71
4. 2.42

Reveal AnswerCorrect Answer: D

Whats next?

Enjoy the "Electric Power and Efficiency" practice questions? People who liked the "Electric Power and Efficiency" practice questions found the following resources useful:

1. Practice Questions Feedback. Helps other - Leave a rating for this practice questions (see below)
2. Electrodynamics Physics tutorial: Electric Power and Efficiency. Read the Electric Power and Efficiency physics tutorial and build your physics knowledge of Electrodynamics
3. Electrodynamics Revision Notes: Electric Power and Efficiency. Print the notes so you can revise the key points covered in the physics tutorial for Electric Power and Efficiency
4. Check your calculations for Electrodynamics questions with our excellent Electrodynamics calculators which contain full equations and calculations clearly displayed line by line. See the Electrodynamics Calculators by iCalculator™ below.
5. Continuing learning electrodynamics - read our next physics tutorial: RC Circuits

Help others Learning Physics just like you

Please provide a rating, it takes seconds and helps us to keep this resource free for all to use

We hope you found this Physics tutorial "Electric Power and Efficiency" useful. If you did it would be great if you could spare the time to rate this physics tutorial (simply click on the number of stars that match your assessment of this physics learning aide) and/or share on social media, this helps us identify popular tutorials and calculators and expand our free learning resources to support our users around the world have free access to expand their knowledge of physics and other disciplines.

Electrodynamics Calculators by iCalculator™

• Amount Of Substance Obtained Through Electrolysis Calculator
• Charge Density Calculator
• Electric Charge Stored In A Rc Circuit Calculator
• Electric Field In Terms Of Gauss Law Calculator
• Electric Power And Efficiency Calculator
• Electron Drift Velocity Calculator
• Equivalent Resistance Calculator
• Force Produced By An Electric Source Calculator
• Joules Law Calculator
• Ohms Law Calculator
• Potential Difference In Rc Circuit Calculator
• Resistance Due To Temperature Calculator
• Resistance Of A Conducting Wire Calculator