Electrical Load Calculation Worksheet
Grade 11 Science worksheet on calculating electrical loads, understanding power, current, voltage, and resistance in circuits.
Includes
Standards
Topics
Electrical Load Calculation
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Date:
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Read each question carefully and provide your answers in the space provided. Show all calculations where necessary.
1. Which of the following is the correct formula for calculating electrical power?
P = V/I
P = I/V
P = V * I
P = R * I
2. What unit is used to measure electrical current?
Volts
Ohms
Watts
Amperes
1. Ohm's Law states that Voltage = Current × .
2. The total power consumed by multiple loads in a parallel circuit is the of the individual powers.
1. Explain the difference between current and voltage in an electrical circuit.
2. A toaster draws 10 Amperes of current from a 120 Volt outlet. Calculate the power consumed by the toaster.
1. In a series circuit, if one light bulb burns out, all other light bulbs will also go out.
True
False
2. Electrical resistance is measured in Watts.
True
False
1. A house has the following electrical appliances:
- Refrigerator: 700 W
- Microwave: 1200 W
- 5 LED light bulbs: 10 W each
- Television: 150 W
If all these appliances are turned on simultaneously and connected to a 240 V power supply, calculate the total current drawn from the supply. Also, determine if a 15 Ampere circuit breaker would be sufficient to handle this load. Justify your answer.