Electrical Load Calculation Worksheet
A Grade 10 math worksheet focusing on electrical load calculations, including Ohm's Law, power calculations, and circuit analysis.
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Electrical Load Calculation Worksheet
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Read each question carefully and show all your work. Use the formulas for Ohm's Law (V = IR) and Power (P = VI) where V is voltage (volts), I is current (amperes), R is resistance (ohms), and P is power (watts). Round your answers to two decimal places where necessary.
1. What is the current flowing through a circuit with a voltage of 12V and a resistance of 4Ω?
3A
48A
0.33A
16A
2. An appliance uses 1200W of power when connected to a 120V supply. What is the current drawn by the appliance?
10A
100A
1.2A
0.1A
3. According to Ohm's Law, voltage is equal to current multiplied by .
4. The unit of electrical power is the .
5. A heater has a resistance of 15Ω and draws a current of 8A. Calculate the voltage across the heater.
6. A light bulb is rated at 60W and operates on a 240V supply. What is the resistance of the light bulb?
7. Consider the following simple circuit:
If the voltage source is 9V and the resistor has a resistance of 3Ω, calculate the current flowing through the circuit.
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