Alternating Current and Frequency
|This problem set deals with alternating current and frequency.|
|1.||An electric generator that produces 600 cycles in 10 sec has a frequency of 60 Hz.|
|2.||The common unit of frequency for one cycle/s is 1 Hz.|
|3.||If a wave has a frequency of 10 cycles/s
(10 Hz), what is its period?
|4.||Frequency is a measure of how often
events repeat themselves. The graph below is a sine wave.
If point A is the starting point, at what later points
does the wave repeat itself? That is, when does the cycle
start over again?
The cycle starts over at points E and H.
|5.||In the graph above, how many complete
cycles are shown for the wave?
|6.||Given the oscilloscope below with the
indicated settings, find the
|7.||Name the type of waveform shown below.
Find its period, frequency and peak-to-peak voltage.
|8.||Find the peak-to-peak voltage, period
and frequency of the sine waveform.
|9.||Find the peak-to-peak voltage, period
and frequency of the sawtooth waveform shown below. Note
that a "×10" oscilloscope probe was used to
obtain the signal. This means that the voltage must be
multiplied by a factor of ten to get the proper answer.
|10.||Find the peak-to-peak voltage and
frequency of the sine wave shown below. Note that a
"x10" oscilloscope probe was used to obtain the
signal. This means that the voltage must be multiplied by
a factor of ten to get the proper answer.
|11.||The electron gun in a TV picture tube
scans the width of the screen. To form an image, it
produces 15.75 ×104 lines on the screen
during a 5 minute period. Find the frequency of the
|12.||The oscilloscope of an engine analyzer
shows that the waveform for an electronic ignition device
on a 6-cylinder engine has a frequency of 6000 pulses/min
at an engine speed of 2000 rpm. Find the
|13.||A train of identical flat cars travels
at constant speed past an observer. The observer sees a
new flat car go by every 4 sec. What is the frequency at
which the cars pass the observer?
|14.||What is the period of the following