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Applied current through inductor is equals to
1/VωL cos(ωt-90°)
VL/ωcos(ωt-90°)
V/ωLcos(ωt-90°)
VωLcos(ωt-90°)
Amplifiers used in mathematical operation have
high gain and input impedance
low gain and input impedance
high gain and low input impedance
low gain and high input impedance
KVL works on principle of law of conservation of
Voltage
Energy
Power
charge
Branch current method generated equations describes relationship between
Lenz's Law and Ohm's Law
Kirchhoff's Law and Lenz's Law
Kirchhoff's Law and Ohm's Law
Faraday's Law and Ohm's Law
An?inductor?stores energy in electromagnetic field created bycurrent.
stored energy is expressed as
W=1/2 LI
W=2LI
W=LI2
W=1/2 LI2
What is the frequency of this 555 astable multivibrator
78 Hz
278 Hz
8 Hz
178 Hz
Common-mode signals have _____
the same amplitude
the same frequency
All of the above
the same phase
The Schmitt trigger is a two-state device that is used for
pulse shaping
input noise rejection
filtering
peak detection
An output that is proportional to the addition of two or more inputs is from which type of amplifier
summing
differentiator
analog subtractor
difference
With negative feedback, the returning signal
is proportional to the output current
opposes the input signal
is proportional to the differential voltage gain
aids the input signal
An ideal amplifier should have
zero offset
high output impedance
moderate gain
high input current
The input offset current equals the
difference between two base currents
difference between two base-emitter voltages
collector current divided by the current gain
average of two base currents
If an op-amp has one input grounded and the other input has a signal feed to it, then it is operating as what
Noninverting mode
common-mode
single-ended
double-ended
If the gain of a closed-loop inverting amplifier is 3.9, with an input resistor value of 1.6 kilohms, what value of feedback resistor is necessary
2.4 kilohms
0.62 kilohms
410 ohms
6240 ohms
If ground is applied to the (+) terminal of an inverting op-amp, the (–) terminal will
have high reverse current
not need an input resistor
not invert the signal
be virtual ground
The magnitude of closed-loop voltage gain
(Acl) of an inverting amplifier equals
the ratio of the input resistance to the feedback resistance
the feedback resistance divided by the input resistance
the input resistance
the open-loop voltage gain Aol
How many leads does the TO-5 metal can package of an operational amplifier have
8 or 14
8, 10, or 12
8 or 16
6, 8, or 10
The Q of a crystal _________
is extremely high
None of the above
is about 40 or so in most cases
is extremely low
How many logic states does an S-R flip-flop have
2
4
3
5
What three subcircuits does a phase locked loop (PLL) consist of
phase comparator, bandpass filter, and demodulator
phase comparator, comparator, and VCO
phase comparator, low-pass filter, and VCO
phase comparator, bandpass filter, and VCO
1
2
4
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