Electric Power and DC Circuits Worksheet
Explore the fundamentals of electric power and DC circuits with this comprehensive worksheet for Grade 9 science students.
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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 unit of electric power?
Volt
Ampere
Watt
Ohm
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 fluctuates
1. Ohm's Law states that voltage is equal to current multiplied by .
2. A DC circuit has a flow of current in direction.
3. Electric power is the rate at which energy is transferred.
1. Define electric power and state its formula.
2. Explain the main difference between a series circuit and a parallel circuit.
1. In a parallel circuit, the voltage across each resistor is the same.
True
False
2. Increasing the resistance in a circuit will increase the current, assuming voltage remains constant.
True
False
Match the term on the left with its definition on the right.
1. Voltage
a. Opposition to the flow of current
2. Current
b. Flow of electric charge
3. Resistance
c. Electric potential difference
1. A circuit has a 12V battery and a 4Ω resistor. Calculate the current flowing through the resistor and the power dissipated by it.