Exercise: Electronic Principles

Questions for: Electronic Principles

At room temperature an intrinsic silicon crystal acts approximately like
A:
a battery
B:
a conductor
C:
an insulator
D:
a piece of copper wire
Answer: C
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What is one important thing transistors do?
A:
Emit light
B:
Amplify weak signals
C:
Regulate voltage
D:
Rectify line voltage
Answer: B
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A low-pass filter:
A:
passes lower-frequency signals and reduces higher-frequency signals
B:
passes higher-frequency signals and reduces lower-frequency signals
C:
has no effect on ac signals
D:
reduces the level of all frequencies by a significant amount
Answer: A
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Which one of the following statements is true for the voltage in a parallel RL circuit?
A:
The voltage always has the same amplitude and phase for every part of the circuit
B:
The total voltage is equal to the sum of the voltages across the resistance and inductance
C:
The total voltage lags the total current by less than 90
D:
The total voltages is less than the sum of the voltages across the resistance and inductance
Answer: A
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The net charge of a neutral copper atom is
A:
0
B:
+1
C:
-1
D:
+4
Answer: B
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