Grade 12 Circuit Calculations Worksheet
A Grade 12 Physics worksheet focusing on circuit calculations including Ohm's Law, series and parallel circuits, and power.
Includes
Standards
Topics
Circuit Calculations
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Date:
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Read each question carefully and show all your work. Use the provided diagrams to assist you in solving the problems.
1. Which of the following statements is true regarding the total resistance in a series circuit?
It is the sum of individual resistances.
It is the reciprocal of the sum of individual resistances.
It is always less than the smallest individual resistance.
It is inversely proportional to the current.
2. If a 12V battery is connected to a resistor and a current of 2A flows through it, what is the resistance of the resistor?
24 Ohms
6 Ohms
0.16 Ohms
12 Ohms
1. Ohm's Law states that voltage is equal to current multiplied by .
2. In a parallel circuit, the voltage across each branch is .
1. A series circuit has three resistors: R1 = 10Ω, R2 = 20Ω, and R3 = 30Ω. If the voltage source is 60V, calculate the total current flowing through the circuit.
2. Consider a parallel circuit with two resistors: R1 = 10Ω and R2 = 15Ω. If the voltage source is 30V, calculate the total equivalent resistance of the circuit.
3. A light bulb with a resistance of 100Ω is connected to a 120V power source. Calculate the power dissipated by the light bulb.
1. In a series circuit, if one component breaks, the entire circuit stops functioning.
True
False
2. Adding more resistors in parallel decreases the total equivalent resistance of the circuit.
True
False
Match each term with its correct definition or formula.
1. Ohm's Law
a. P = IV
2. Electrical Power
b. V = IR
3. Series Circuit Current
c. Remains constant
4. Parallel Circuit Voltage
d. Is the same across all components