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ATT Test 3 Questions and Answers 100% Correct | New Update 2025
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ATT Test 3 Questions and Answers 100% Correct | New Update 2025
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ATT Test 3 Questions and Answers 100% Correct| New Update 2025
What is the frequency of a wave? - ANSWER number of cycles per second
What is frequency measured in? - ANSWER Hertz
3 cycles per second equals how many hertz? - ANSWER 3 Hz
What is the period of a wave? - ANSWER Time per cycle
What is wavelength? - ANSWER the actual distance between beginning and
end of one cycle (meters/centimeters)
What is induction? - ANSWER generation of AC current by changing a magnetic
field (flux variation)
Flux variation is (directly/indirectly) proportional to induction and current? -
ANSWER directly
What is needed to induce current? - ANSWER conductor, magnetic field,
relative motion
What is peak voltage? - ANSWER highest positive or negative voltage obtained
, What is peak to peak voltage? - ANSWER determined by doubling peak
voltage, from highest positive point to lowest negative point
What is average voltage? - ANSWER Calculated using sum of all angles
contained in 180 degrees (0.637 X peak V)
What is RMS voltage? - ANSWER most common method to describe voltage of
sine wave (0.707 X peak V)
120 VAC RMS = How much VDC? - ANSWER 120 VDC
What is phase angle? - ANSWER amount by which waveforms lead or lag one
another
What phase angle has peaks of OPPOSITE POLARITY happening at the same time?
- ANSWER 180 degrees
What are harmonic frequencies? - ANSWER echoes of the fundamental
frequency, creates non-sinusoidal waves when combined with fundamental
frequency
How are harmonic frequencies calculated? - ANSWER determined by
multiplying fundamental frequency by harmonic number
What do oscilloscopes directly measure? - ANSWER Amplitude, period,
waveshape
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