Question

1. Imagine a sine wave on the oscilloscope screen that had an amplitude of 4V and a period of 2ms. If you turn the time/division knob to something larger, will one number change, both, or neither? If one does change, does it increase or decrease?

2. When measuring amplitude of a wave, why is it useful to measure from the bottom to the top of the wave?

3. What is the mechanical audio signal that the microphone receives changed to for the oscilloscope?

a) Electrical signal

b) voltage signal

c) time signal

d) stays as audio signal

4. What do the axes on the oscilloscope need to be when producing Lissajous figures?

a) voltave vs time

b) voltage vs voltage

c) time vs time

d) time vs voltage

Answer 1

1) The time/division knob in the oscillascope is used to control the Time Period thereby the Wavelength of the output wave. Therefore, when the time/division is change the period of the wave also changes.

If larger values of Time/ Division is taken the period of the wave will increase accordingly.

2) The Amplitude of the wave gives the voltage across any two points in the circuit. Therefore to measure the accurate amplitude of the output wave the peak to peak measurement are taken.

3) The basic operation of a Microphone is converting an audio signal into an Electric Signal. Thus Electrical Signals are fed into the oscilloscope from the Microphone.

4) The Lissajous Figure or pattern appears on the oscilloscope screen when sinusoidal signals are given to the Horizontal and Vertical deflection plates of the Oscilloscope.This can be produced only when both the axes measure the Voltage. Therefore, the right answer is b) Voltage vs Voltage .

Hope this helps!!