ATT Test 3 (Latest 2024/ 2025 Update) Questions
and Verified Answers| 100% Correct| Grade A
What is the frequency of a wave? - ANSWERnumber of cycles per second
What is frequency measured in? - ANSWERHertz
3 cycles per second equals how many hertz? - ANSWER3 Hz
What is the period of a wave? - ANSWERTime per cycle
What is wavelength? - ANSWERthe actual distance between beginning and end of
one cycle (meters/centimeters)
What is induction? - ANSWERgeneration of AC current by changing a magnetic field
(flux variation)
Flux variation is (directly/indirectly) proportional to induction and current? -
ANSWERdirectly
What is needed to induce current? - ANSWERconductor, magnetic field, relative
motion
What is peak voltage? - ANSWERhighest positive or negative voltage obtained
What is peak to peak voltage? - ANSWERdetermined by doubling peak voltage, from
highest positive point to lowest negative point
What is average voltage? - ANSWERCalculated using sum of all angles contained in
180 degrees (0.637 X peak V)
What is RMS voltage? - ANSWERmost common method to describe voltage of sine
wave (0.707 X peak V)
120 VAC RMS = How much VDC? - ANSWER120 VDC
What is phase angle? - ANSWERamount by which waveforms lead or lag one another
What phase angle has peaks of OPPOSITE POLARITY happening at the same time? -
ANSWER180 degrees
What are harmonic frequencies? - ANSWERechoes of the fundamental frequency,
creates non-sinusoidal waves when combined with fundamental frequency
How are harmonic frequencies calculated? - ANSWERdetermined by multiplying
fundamental frequency by harmonic number
and Verified Answers| 100% Correct| Grade A
What is the frequency of a wave? - ANSWERnumber of cycles per second
What is frequency measured in? - ANSWERHertz
3 cycles per second equals how many hertz? - ANSWER3 Hz
What is the period of a wave? - ANSWERTime per cycle
What is wavelength? - ANSWERthe actual distance between beginning and end of
one cycle (meters/centimeters)
What is induction? - ANSWERgeneration of AC current by changing a magnetic field
(flux variation)
Flux variation is (directly/indirectly) proportional to induction and current? -
ANSWERdirectly
What is needed to induce current? - ANSWERconductor, magnetic field, relative
motion
What is peak voltage? - ANSWERhighest positive or negative voltage obtained
What is peak to peak voltage? - ANSWERdetermined by doubling peak voltage, from
highest positive point to lowest negative point
What is average voltage? - ANSWERCalculated using sum of all angles contained in
180 degrees (0.637 X peak V)
What is RMS voltage? - ANSWERmost common method to describe voltage of sine
wave (0.707 X peak V)
120 VAC RMS = How much VDC? - ANSWER120 VDC
What is phase angle? - ANSWERamount by which waveforms lead or lag one another
What phase angle has peaks of OPPOSITE POLARITY happening at the same time? -
ANSWER180 degrees
What are harmonic frequencies? - ANSWERechoes of the fundamental frequency,
creates non-sinusoidal waves when combined with fundamental frequency
How are harmonic frequencies calculated? - ANSWERdetermined by multiplying
fundamental frequency by harmonic number
