Exercise: Electronic Principles

Questions for: Electronic Principles

The total capacitance of a series capacitor circuit is:
A:
equal to the sun of the individual capacitive-reactance values
B:
equal to the sum of the individual capacitance values
C:
equal to the source voltage divided by total current
D:
less than the value of the smallest capacitor
Answer: D
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An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current?
A:
28.4 mA
B:
24.2 mA
C:
34.4 mA
D:
68.4 mA
Answer: B
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How much current flows through a 0.02 micro F capacitor that is operating from a 12-V ac, 100-Hz source?
A:
0.151 mA
B:
157 raA
C:
0.995 mA
D:
2.02 A
Answer: A
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Doubling the operating frequency of a purely capacitive circuit:
A:
has no effect on the total circuit current
B:
doubles the amount of total current
C:
cuts the total current by one-half
D:
thrice the amount of total current
Answer: B
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Current can flow through a normally open push button switch as long as:
A:
you are pressing the button
B:
you are not pressing the button
C:
its contact remain open
D:
its contact remain open
Answer: B
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