Grade 8 Math: Load Calculation Worksheet
A worksheet for Grade 8 students to practice load calculation, including understanding power, voltage, and current.
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Grade 8 Math: Load Calculation
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Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.
1. The unit of electrical power is the .
2. Voltage is measured in .
3. Electrical current is measured in .
4. Ohm's Law states that Voltage = Current × .
5. Which formula is used to calculate electrical power?
P = V / I
P = I / V
P = V × I
P = V + I
6. A device draws 5 Amperes of current from a 120 Volt supply. What is its power consumption?
24 Watts
600 Watts
125 Watts
1200 Watts
7. A light bulb is rated at 75 Watts and operates on a 120 Volt circuit. Calculate the current (in Amperes) flowing through the bulb. Show your work.
8. An electric heater has a resistance of 15 Ohms and draws 8 Amperes of current. What is the voltage (in Volts) across the heater? Show your work.
9. Increasing the voltage in a circuit will decrease the current, assuming resistance remains constant.
True
False
10. The total power consumed by multiple devices in a parallel circuit is the sum of the individual powers.
True
False