Efficiency of Energy Transfer
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More Lessons for IGCSE Physics
Math Worksheets
A series of free GCSE/IGCSE Physics Notes and Lessons.
• Describe what is meant by efficiency of energy transfer.
• How to calculate energy efficiency.
• Describe ways to increase the efficiency of energy transfer.
Examples:
1. An electric hob is used to heat water. 15,000 J of thermal energy is transferred by the hob. 12,000 J of thermal energy passes into the water. Calculate the efficiency of energy transfer into the water.
2. An electric current delivers a power of 60 watts to a light bulb. 3 watts of electrical energy are transferred to light energy. Calculate the efficiency of the bulb. Efficiency of appliances
Conservation of energy and what happens to wasted energy.
How to calculate the efficiency of appliances?
You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
More Lessons for IGCSE Physics
Math Worksheets
A series of free GCSE/IGCSE Physics Notes and Lessons.
Efficiency of Energy Transfer
The following diagram gives the formula for energy efficiency. Scroll down the page for more examples and solutions on how to use the formula.
• Describe what is meant by efficiency of energy transfer.
• How to calculate energy efficiency.
• Describe ways to increase the efficiency of energy transfer.
Examples:
1. An electric hob is used to heat water. 15,000 J of thermal energy is transferred by the hob. 12,000 J of thermal energy passes into the water. Calculate the efficiency of energy transfer into the water.
2. An electric current delivers a power of 60 watts to a light bulb. 3 watts of electrical energy are transferred to light energy. Calculate the efficiency of the bulb. Efficiency of appliances
Conservation of energy and what happens to wasted energy.
How to calculate the efficiency of appliances?
Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.
You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
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