PH-2289

Power

Physics · Secondary 4 · Medium · Power

A heater of power rating 1500 W is used for 20 minutes to boil water. How much electrical energy does it use in joules?

$1.8\times 10^6\,\text{J}$
$1.8\times 10^5\,\text{J}$
$7.5\times 10^4\,\text{J}$
$9.0\times 10^7\,\text{J}$

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