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Massachusetts Comprehensive Assessment System
2015, High School Technology/Engineering
Question 23: Open-Response |
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Reporting Category: Electrical and Communication Systems Standard: 5.3 - Explain the relationship between voltage, current, and resistance in a simple circuit, using Ohm's law.
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A simple circuit is shown below. - Calculate the current in the circuit. Show your calculations and include units in your answer.
A second resistor, R2, with a resistance of 10 Ω, is added to the circuit and placed in series with R1. - Calculate the total resistance in this circuit. Show your calculations and include units in your answer.
- Calculate the current in this circuit. Show your calculations and include units in your answer.
- Describe how adding this second resistor, R2, in series affects the power output of the battery. Explain your answer.
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Scoring Guide and Sample Student Work Select a score point in the table below to view the sample student response.
Score | Description |
4 |
The response demonstrates a thorough understanding of the relationships among voltage, current, resistance, and power in a circuit. The response correctly calculates the current of the simple circuit. The response correctly calculates the resistance and the current in the circuit when a second resistor is added. The response also clearly describes and explains how this affects the power output of the battery. |
4 |
3 |
The response demonstrates a general understanding of the relationships among voltage, current, resistance, and power in a circuit. |
2 |
The response demonstrates a limited understanding of the relationships among voltage, current, resistance, and power in a circuit. |
1 |
The response demonstrates a minimal understanding of the relationships among voltage, current, resistance, and power in a circuit. |
0 |
The response is incorrect or contains some correct work that is irrelevant to the skill or concept being measured. |
Note: There are 2 sample student responses for Score Point 4.
High School Technology/Engineering
- Question 11: Fluid and Thermal Systems
- Question 23: Electrical and Communication Systems
- Question 33: Engineering Design
- Question 44: Fluid and Thermal Systems
- Question 45: Construction and Manufacturing
Return to the MCAS 2015 Student Work Directory
Last Updated: August 19, 2013
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