12.
If the output voltage across the inductor in a synthesizer's
series RL circuit reaches only a fraction of the input voltage,
the circuit will be classified as a
a.
shorttimeconstant, highpass circuit.
b.
longtimeconstant, highpass circuit.
c.
shorttimeconstant, lowpass circuit.
d.
longtimeconstant, lowpass circuit.
13.
If a highpass series RL circuit's time constant is changed from
short to long by changing the values of inductance, the maximum
values of the output voltage and the current in the RL circuit
for a given input voltage will be
a.
lower.
b.
higher.
c.
lower and higher, respectively.
d.
higher and lower, respectively.
14.
If a highpass RL circuit does not act as a differentiator, the
reason may be that the
a.
rate of change of current is too great.
b.
current flow is too great.
c.
inductance is too small.
d.
inductance is too large.
15.
Multiplexers and communication receivers use integrating
circuits to restore distorted waveforms to their original
shapes. A waveform is considered to be integrated when the
amplitude of the output voltage is proportional to the
a.
rate of change of the applied voltage.
b.
amplitude of the applied voltage.
c.
energy stored in the circuit.
d.
rate of change of current.
96
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