Grade 12 Electric Circuits Worksheet
This worksheet covers fundamental concepts of electric circuits, including Ohm's Law, series and parallel circuits, and power calculations, suitable for Grade 12 physics students.
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Grade 12 Electric Circuits Worksheet
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Read each question carefully and answer to the best of your ability. Show all work for calculations.
1. Which of the following statements is true regarding Ohm's Law?
Voltage is directly proportional to current and resistance.
Current is inversely proportional to voltage and resistance.
Resistance is directly proportional to voltage and inversely proportional to current.
Voltage is directly proportional to current and inversely proportional to resistance.
2. In a series circuit, what happens to the total resistance as more resistors are added?
It decreases.
It increases.
It remains the same.
It depends on the individual resistor values.
1. The unit of electrical current is the .
2. In a parallel circuit, the voltage across each component is .
3. Electrical power is calculated by multiplying voltage by .
1. State Ohm's Law and explain its significance in circuit analysis.
2. Differentiate between a series circuit and a parallel circuit in terms of current flow and voltage distribution.
Analyze the circuit diagram below and answer the questions that follow.
3. For the series circuit shown above, if R1 = 10 Ω, R2 = 20 Ω, and the voltage source is 12 V:
a) Calculate the total resistance of the circuit.
b) Calculate the total current flowing through the circuit.
c) Calculate the voltage drop across each resistor.
1. Kirchhoff's Current Law states that the sum of currents entering a junction equals the sum of currents leaving the junction.
True
False
2. The resistance of a wire increases with its length and decreases with its cross-sectional area.
True
False
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