Power (Edexcel GCSE Physics): Quizzes

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1.1.10 Power
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What is power defined as?

Rate of energy transfer

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

Work is done

Which formula correctly represents power?

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 power does 1 joule per second equal?

1 watt

In the formula P=EtP = \frac{E}{t}, what unit is EE measured in?

Joules (J)

In the formula P=WtP = \frac{W}{t}, what unit is tt measured in?

Seconds (s)

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

Motor A

Why is a faster motor more powerful when doing the same work?

Energy transferred at faster rate

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