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Electronics - Alternating Current vs Direct Current

Exercise

"Nothing in life is to be feared, it is only to be understood."
- Marie Curie
1. 

What are the two main applications for ac?
A. direct, pulsating
B. electric, magnetic
C. power, information
D. static, dynamic
2. 

The distance that a signal's energy can travel in the time it takes for one cycle to occur is called the signal's:
A. amplitudeB. frequency
C. wavelengthD. period
3. 

One oscilloscope selector knob that allows the major and minor divisions of the graticule to be used to determine a signal amplitude value is called the:
A. time/cm control
B. position control
C. intensity control
D. volts/cm control
4. 

If current varies periodically from zero to a maximum, back to zero, and then repeats, the signal is:
A. directB. alternating
C. pulsatingD. repetitive
5. 

What voltage will an ac voltmeter display?
A. rmsB. average
C. peakD. peak-to-peak

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