12-11 AC Wave Generation Recap

Front

What is the definition of Direct Current (DC)?

Back

Direct Current (DC) is the unidirectional flow of electric charge, meaning the electric charge flows in a constant direction.

Front

What is the unit of frequency?

Back

The unit of frequency is Hertz (Hz), which represents one cycle per second.

Front

How do you calculate frequency from the time period?

Back

Frequency (f) is calculated as the reciprocal of the time period (T): f = 1/T.

Front

What is the relationship between frequency and wavelength in a wave?

Back

Frequency (f) is inversely proportional to wavelength (λ) in a wave, described by the equation: v = f * λ, where v is the wave speed.

Front

What does a C.R.O. (Cathode Ray Oscilloscope) display?

Back

A C.R.O. displays waveforms of electrical signals, allowing visualization of voltage changes over time.

Front

What is the peak voltage in a waveform?

Back

The peak voltage is the maximum voltage level reached by the waveform.

Front

If the time-base of a C.R.O. is set to 10 ms/div and a wave takes 5 divisions to complete one cycle, what is the frequency?

Back

Frequency = 1 / (Time period) = 1 / (10 ms/div * 5 div) = 20 Hz.

Front

What is the formula to convert milliseconds to Hertz?

Back

To convert milliseconds to Hertz, use the formula: Frequency (Hz) = 1000 / Time period (ms).

Front

What is an alternating current (AC)?

Back

Alternating Current (AC) is an electric current that reverses direction periodically, typically represented as a sine wave.

Front

What is the significance of the time-base setting on a C.R.O.?

Back

The time-base setting on a C.R.O. determines the time scale for the horizontal axis, affecting how the waveform is displayed over time.