A typical home has wiring which can deliver up to 20kW of electrical power. How much electrical energy could such a home use in one second?

(A) 20J. (B) 2000J. (C) 20,000J.

(D) 2,000,000J. (E) 20,000,000J.


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A typical home has wiring which can deliver up to 20kW of electrical power. How much electrical energy could such a home use in one second?

(A) 20J. --- No.

These are kilowatts, not watts.

Try again.
Questions --- What this question is about
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A typical home has wiring which can deliver up to 20kW of electrical power. How much electrical energy could such a home use in one second?

(B) 2000J. --- No.

1kW = 1000W so multiply by 1000.

Try again.
Questions --- What this question is about
23.3
































A typical home has wiring which can deliver up to 20kW of electrical power. How much electrical energy could such a home use in one second?

(C) 20,000J. --- Yes.

1kW = 1000W, 20kW = 20,000J/s.

Check the other answers.
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A typical home has wiring which can deliver up to 20kW of electrical power. How much electrical energy could such a home use in one second?

(D) 2,000,000J. --- No.

1kW = 1000W so multiply by 1000.

Try again.
Questions --- What this question is about
23.3
































A typical home has wiring which can deliver up to 20kW of electrical power. How much electrical energy could such a home use in one second?

(E) 20,000,000J. --- No.
These are not megawatts. 1kW = 1000W
so multiply by 1000.

Try again.
Questions --- What this question is about
23.3