Measuring Current and Voltage Worksheet
Grade 9 Science worksheet focusing on understanding and measuring electric current and voltage in circuits.
Includes
Standards
Topics
Measuring Current and Voltage
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Read each question carefully and answer to the best of your ability. Show all work for calculations.
1. Electric current is measured in , using an instrument called an .
2. Voltage, also known as potential difference, is measured in , using an instrument called a .
3. An ammeter must be connected in with the component to measure the current flowing through it.
4. A voltmeter must be connected in across the component to measure the potential difference across it.
5. Which of the following best describes electric current?
The opposition to the flow of charge.
The rate of flow of electric charge.
The energy possessed by an electric charge.
The force between two electric charges.
6. Why is a voltmeter connected in parallel?
To measure the total current.
To provide a path for the current.
It has high resistance and draws minimal current.
It has low resistance and allows current to flow easily.
7. An ideal ammeter has very high resistance.
True
False
8. The unit for electric potential difference is the Ampere.
True
False
9. Explain the difference between electric current and voltage in a circuit.
10. Draw a simple circuit diagram showing a battery, a light bulb, an ammeter, and a voltmeter, all correctly connected to measure the current through and voltage across the light bulb.
11. Identify the instrument shown in the image that measures current and the instrument that measures voltage.