Power (OCR GCSE Physics A (Gateway Science Suite)): Quizzes

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Power
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What is power defined as?

Rate at which energy is transferred

Power can also be defined as the rate at which what is done?

Work

What is the formula for power using energy transferred?

P=EtP = \frac{E}{t}

What is the formula for power using work done?

P=WtP = \frac{W}{t}

What is the unit of power?

Watts (W)

What is the unit of energy transferred in the power formula?

Joules (J)

What is the unit of time in the power formula?

Seconds (s)

What power does 1 joule per second equal?

1 watt

Two motors do the same work. Motor A finishes faster. Which is more powerful?

Motor A

Why is a motor that finishes work faster more powerful?

Energy transferred at a faster rate

Explore OCR GCSE Physics A (Gateway Science Suite) Revision Notes by Topics

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Energy Changes in a System

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Energy Changes in a System

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