What does a multimeter not usually show that an oscilloscope can?
Frequency, noise, or amplitude of a signal
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5
What instrument is used to display electrical signals and monitor their variations over time?
An oscilloscope
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15
Name two examples of waveform shapes that can be identified using an oscilloscope.
Sine, square, triangle (any two).
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20
What is the function of the “trigger” on an oscilloscope?
It stabilises the display and tells the instrument when to start measuring part of the signal.
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5
On an oscilloscope display, what does the Y-axis represent?
Voltage
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On an oscilloscope display, what does the X-axis represent?
Time
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15
Why is an oscilloscope useful for understanding how a circuit works?
Because it shows the signals the circuit produces and their characteristics.
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25
How are a function generator and an oscilloscope used together during circuit testing?
The function generator sends a signal and the same signal into the oscilloscope; the oscilloscope then compares the input signal and the circuit’s output.
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20
What do the vertical and horizontal scale controls on an oscilloscope do?
They adjust the graph’s scale, allowing the user to zoom in and out on a signal.
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10
What does “frequency” mean in relation to a waveform?
The number of times per second a waveform repeats.
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15
What does “amplitude” measure?
The magnitude (or strength) of a signal.
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10
True or False: Oscilloscopes only measure voltage-based characteristics.
False – they measure both time-based and voltage-based characteristics.
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20
What is the purpose of the “cursor” button?
It allows the user to select specific measurements manually on the screen.
