Power, energy and efficiency
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Intros
Examples
Lessons
- Solving for Power and Resistance
- Solving for Power, Current and Energy
- Solving for Power and Voltage
- Solving for Power and Efficiency
An electric crane runs off of a 100V source at a current of 14A. The crane lifts a 180kg block 17.5m in the air (vertically) in 35 seconds. What is the efficiency of the crane? - Solving for Power and Efficiency
A lightbulb emits approximately 300 J of light energy in 5 seconds. If this bulb is 16% efficient, what is the power supplied to the lightbulb?