Technical Standards and Safety Authority (TSSA) G3 Practice Exam

To determine the kilowatt output of an electric heater, you can use the formula for electrical power:

\[ \text{Power (in watts)} = \text{Voltage (in volts)} \times \text{Current (in amps)} \]

For this scenario, the heater operates on a 240-volt supply and draws 50 amps. By plugging the values into the formula, you get:

\[ \text{Power} = 240 \text{ volts} \times 50 \text{ amps} = 12,000 \text{ watts} \]

Next, to convert watts to kilowatts, you divide the number of watts by 1,000:

\[ 12,000 \text{ watts} \div 1,000 = 12 \text{ kilowatts} \]

This calculation shows that the electric heater indeed outputs 12 kilowatts. Therefore, the correct output for the heater is 12 kilowatts.