Electric Power and DC Circuits Worksheet
Grade 12 Physics worksheet covering fundamental concepts of electric power, DC circuits, Ohm's Law, and Kirchhoff's Laws.
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Standards
Topics
Electric Power and DC Circuits
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Which of the following is the correct definition of electric power?
The rate at which charge flows through a circuit.
The amount of energy consumed per unit time.
The opposition to the flow of electric current.
The potential difference between two points in a circuit.
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 value of the resistors.
3. Ohm's Law states that voltage is directly proportional to and .
4. Kirchhoff's Current Law (KCL) states that the total current entering a junction must equal the total current that junction.
5. Explain the difference between a series circuit and a parallel circuit. You may refer to the images below.
6. The total power consumed in a parallel circuit is the sum of the power consumed by each individual component.
True
False
7. In a DC circuit, the current flows in only one direction.
True
False
8. A 12V battery is connected to three resistors in series: R1 = 2Ω, R2 = 4Ω, and R3 = 6Ω. Calculate the total resistance of the circuit, the total current flowing through the circuit, and the voltage drop across each resistor.
9. Two resistors, R1 = 10Ω and R2 = 15Ω, are connected in parallel across a 30V power supply. Calculate the equivalent resistance of the parallel combination, the total current drawn from the supply, and the current flowing through each resistor.
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