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# Massachusetts Comprehensive Assessment System

## 2014, High School Technology/Engineering

 Question 44: Open-Response Reporting Category: Electrical and Communication SystemsStandard: 5.1 - Explain how to measure and calculate voltage, current, resistance, and power consumption in a series circuit and in a parallel circuit. Identify the instruments used to measure voltage, current, power consumption, and resistance. An electrical circuit can be constructed using wire, a load, and a power source.Identify one object that can be used as a load in an electrical circuit.Ammeters and voltmeters are instruments used to make measurements in electrical circuits.Describe how to connect an ammeter to make a measurement.Describe how to connect a voltmeter to make a measurement.Suppose you have a simple electrical circuit with one load. Describe one measurable change in the circuit that would result from connecting a second, identical load in parallel with the first load.

### Scoring Guide and Sample Student WorkSelect a score point in the table below to view the sample student response.

ScoreDescription
4 The response demonstrates a thorough understanding of electrical circuits, including circuit components and how to measure voltage and current. The response correctly identifies one object that can be used as a load in an electrical circuit. The response clearly describes how to place an ammeter and voltmeter in a circuit. The response also clearly describes one change that results from connecting a second load in parallel.
4
3 The response demonstrates a general understanding of electrical circuits, including circuit components and how to measure and calculate voltage and current.
2 The response demonstrates a limited understanding of electrical circuits, including circuit components and how to measure and calculate voltage and current.
1 The response demonstrates a minimal understanding of electrical circuits, including circuit components and how to measure and calculate voltage and current.
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.

Question 11:
Question 23:
Question 33:
Question 44:
Question 45: