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Discussion
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Arithmetic Operations and Circuits
See What Others Are Saying!
Question
In binary number systems the sign of a number is indicated by _________.
Options
A. using a 0 (zero) bit in front of negative numbers
B. inverting the bits if the number is negative
C. including a sign bit along with the magnitude bits
D. placing a negative sign in front of the number
Correct Answer
including a sign bit along with the magnitude bits
More questions
1. What is the percent of regulation if V
nl
= 20 V and V
fl
= 19.8 V?
Options
A. 0%
B. 1%
C. .1%
D. 5%
Show Answer
Scratch Pad
Discuss
Correct Answer: 1%
2. The impedance is 1177 Ω.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
3. What is the total inductance, assuming no mutual inductance?
Options
A. 12 mH
B. 6 mH
C. 0.73 mH
D. 0 mH
Show Answer
Scratch Pad
Discuss
Correct Answer: 12 mH
4. A voltage is induced in a transformer secondary winding by the action of the:
Options
A. secondary magnetic field
B. primary turns ratio
C. primary magnetic field
D. secondary counter emf
Show Answer
Scratch Pad
Discuss
Correct Answer: primary magnetic field
5. Current will cause a magnetic field in a conductor as follows:
Options
A. An ac current causes a fixed polarity magnetic field.
B. A dc current causes a fixed polarity magnetic field.
C. A dc current causes an alternating magnetic field.
D. An ac current causes a fixed polarity magnetic field and a dc current causes an alternating magnetic field.
Show Answer
Scratch Pad
Discuss
Correct Answer: A dc current causes a fixed polarity magnetic field.
6. If you wanted to decrease the inductance of a coil, you might increase the:
Options
A. number of turns
B. permeability of the core
C. spacing between turns
D. area of the coil
Show Answer
Scratch Pad
Discuss
Correct Answer: spacing between turns
7. A 24 V peak source is connected across a 900 µH inductor. If the frequency of the source is 22 kHz, what is the reactive power?
Options
A. 2.3 VAR
B. 4.6 VAR
C. 9.3 VAR
D. 0 VAR
Show Answer
Scratch Pad
Discuss
Correct Answer: 2.3 VAR
8. An inductor is in series with a voltage source, an open switch, and a resistor. The instant the switch is closed, the inductor acts like
Options
A. a short
B. an open
C. a resistor
D. a voltage source
Show Answer
Scratch Pad
Discuss
Correct Answer: an open
9. A henry value divided by a circuit resistive value provides the:
Options
A. counter emf value
B. induced voltage amplitude
C. rise or decay time constant
D. quality factor of the coil
Show Answer
Scratch Pad
Discuss
Correct Answer: induced voltage amplitude
10. You could decrease the time constant of an
RL
circuit by
Options
A. adding a resistor in parallel with the circuit resistance
B. adding an inductor in series with the circuit inductance
C. decreasing the amplitude of the input voltage
D. exchanging the position of the resistor and inductor in the circuit
Show Answer
Scratch Pad
Discuss
Correct Answer: adding an inductor in series with the circuit inductance
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Alternating Current and Voltage
Alternating Current vs Direct Current
Analog and Digital Converters
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Arithmetic Operations and Circuits
Basic Op-Amp Circuits
Bipolar Junction Transistors (BJT)
Capacitors
Combinational Logic Circuits
Computer Hardware and Software
Diodes and Applications
Field Effect Transistors (FET)
Flip-Flops and Timers
Inductors
Logic Circuit Simplification
Logic Gates
Magnetism and Electromagnetism
Measurement, Conversion and Control
Number Systems and Codes
Ohm's Law
Operational Amplifiers
Parallel Circuits
Programmable Logic Devices (PLD)
Quantities and Units
RC Circuits
Resistance and Power
RL Circuits
RLC Circuits and Resonance
Semiconductor Memory
Semiconductor Principles
Sequential Logic Circuits
Series-Parallel Circuits
Series Circuits
Special-Purpose Op-Amp Circuits
Standard Logic Devices (SLD)
Testing and Troubleshooting
Thyristors and Tranducers
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Voltage and Current