G6A: Resistors; capacitors; inductors
G6A01:
What will happen to the resistance if the temperature of a carbon resistor is increased?
It will change depending on the resistor's temperature coefficient rating
It will increase by 20% for every 10 degrees centigrade
It will stay the same
It will become time dependent
G6A02:
What type of capacitor is often used in power-supply circuits to filter the rectified AC?
Electrolytic
Disc ceramic
Vacuum variable
Mica
G6A03:
Which of the following is the primary advantage of ceramic capacitors?
Comparatively low cost
Tight tolerance
High stability
High capacitance for given volume
G6A04:
Which of the following is an advantage of an electrolytic capacitor?
High capacitance for given volume
Tight tolerance
Non-polarized
Inexpensive RF capacitor
G6A05:
Which of the following is one effect of lead inductance in a capacitor used at VHF and above?
Effective capacitance may be reduced
Voltage rating may be reduced
ESR may be reduced
The polarity of the capacitor might become reversed
G6A06:
What is the main disadvantage of using a conventional wire-wound resistor in a resonant circuit?
The resistor's inductance could detune the circuit
The resistor's tolerance value would not be adequate for such a circuit
The resistor could overheat
The resistor's internal capacitance would detune the circuit
G6A07:
What is an advantage of using a ferrite core with a toroidal inductor?
All of these choices are correct
Large values of inductance may be obtained
The magnetic properties of the core may be optimized for a specific range of frequencies
Most of the magnetic field is contained in the core
G6A08:
How should two solenoid inductors be placed so as to minimize their mutual inductance?
With their winding axes at right angles to each another
In line with their winding axis
With their winding axes parallel to each other
Within the same shielded enclosure
G6A09:
Why might it be important to minimize the mutual inductance between two inductors?
To reduce or eliminate unwanted coupling
To increase the energy transfer between both circuits
To reduce conducted emissions
To increase the self-resonant frequency of both inductors
G6A10:
What is an effect of inter-turn capacitance in an inductor?
The inductor may become self resonant at some frequencies
The magnetic field may become inverted
The permeability will increase
The voltage rating may be exceeded
G6A11:
What is the common name for a capacitor connected across a transformer secondary that is used to absorb transient voltage spikes?
Suppressor capacitor
Clipper capacitor
Trimmer capacitor
Feedback capacitor
G6A12:
What is the common name for an inductor used to help smooth the DC output from the rectifier in a conventional power supply?
Filter choke
Back EMF choke
Repulsion coil
Charging inductor
G6A13:
What type of component is a thermistor?
A device having a controlled change in resistance with temperature variations
A resistor that is resistant to changes in value with temperature variations
A special type of transistor for use at very cold temperatures
A capacitor that changes value with temperature
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