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Physics Key Words > Electrical Energy > Flashcards

Electrical Energy Flashcards

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1
Q

What is the meaning of Power?

A

The energy transformed or transferred per second. The unit of power is the watt (w)

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2
Q

What is the meaning of Watt?

A

The unit of power.

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3
Q

What is the meaning of Kilowatt?

A

1000 watts.

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4
Q

What is the meaning of Kilowatt-hour?

A

Electrical energy supplies to a 1kw electrical devise in 1 hour.

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5
Q

What is the meaning of Cost Effective?

A

To make sure you get value for money we need to make sure the appliance we chose is cost effective.

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6
Q

What is the formula for Power?

A

P=E/T

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7
Q

What is the formula for Efficiency?

A

Useful power out/total power in x100%

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8
Q

What is the formula for Energy transferred?

A

E=PxT

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9
Q

What is the formula for Total Cost of Electricity?

A

Number of kWh used x cost per kWh.

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10
Q

What is the meaning of Electrical Appliances?

A

They transfer electrical energy in to useful energy at the flick of a switch.

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Physics Key Words (5 decks)

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