ATT TEST 3 EXAM / 2025 – 2026 WELL DETAILED
QUESTIONS AND COMPREHENSIVE ANSWERS /
OPTIMIZED FOR SUCCESS / ALREADY GRADED A+
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
QUESTIONS AND COMPREHENSIVE ANSWERS /
OPTIMIZED FOR SUCCESS / ALREADY GRADED A+
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
