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Series and Parallel Circuits — Free MYP2 Sciences Practice Questions
1QuestionAdvantages and Disadvantages of Each TypeConcept Practice
2 marks~3 minCriterion A
The diagrams below show a series circuit and a parallel circuit, each containing a battery, bulbs, and a switch.
a
Identify the component that controls the flow of electricity in the diagrams. [1]
b
State one difference in how a switch affects the bulbs in a series circuit compared to a parallel circuit. [1]
Solutions
2QuestionCurrent and Voltage in Series CircuitsAssessment Practice
3 marks~5 minCriterion C
The graph shows the current measured at points A, B, and C in a series circuit with three identical bulbs. The current reading is the same at all three points.
a
Identify the number of paths available for current to flow in a series circuit. [1]
b
Explain why the current is the same at points A, B, and C. [1]
c
A student claims that adding a fourth identical bulb to the series circuit will cause the current to be different at different points. Compare this claim with your answer to (b) and decide whether the student is correct. [1]
Solutions
3QuestionAdvantages and Disadvantages of Each TypeAssessment Practice
6 marks~9 minCriterion D
A student is designing a camping lantern for a 3-night hike. Batteries cannot be replaced. They have two identical 1.5 V batteries and one bulb rated at 1.5 V.
Circuit S connects the batteries in series. Circuit P connects the batteries in parallel.
Circuit S connects the batteries in series. Circuit P connects the batteries in parallel.
a
State the total voltage supplied in Circuit S and in Circuit P. [2]
b
The bulb is connected to Circuit S. Calculate the current through the bulb, given that its resistance is 3 Ω. Explain whether the bulb will be brighter or dimmer than normal. [2]
c
Compare Circuit S and Circuit P for use on the 3-night hike. In your answer, refer to both brightness and battery life. [2]
Solutions
4QuestionCurrent and Voltage in Parallel CircuitsAssessment Practice
5 marks~8 minCriterion B
A student investigates current in a parallel circuit. She records the following measurements:
Measurement 1: Branch A = 0.3 A, Branch B = 0.3 A, Total = 0.6 A
Measurement 2: Branch A = 0.4 A, Branch B = 0.2 A, Total = 0.6 A
Measurement 1: Branch A = 0.3 A, Branch B = 0.3 A, Total = 0.6 A
Measurement 2: Branch A = 0.4 A, Branch B = 0.2 A, Total = 0.6 A
a
Identify the relationship between the branch currents and the total current. [1]
b
The student adds a third branch. The total current stays at 0.6 A. Branch A carries 0.2 A and Branch B carries 0.1 A. Calculate the current in Branch C. [2]
c
Compare the two-branch and three-branch situations and explain why the same relationship applies in both cases. [2]
Solutions
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