NCATT AET LATEST EXAM QUESTIONS WITH CORRECT DETAILED ANSWERS GRADED A+
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NCATT AET LATEST EXAM QUESTIONS WITH CORRECT DETAILED ANSWERS GRADED A+
What determines whether the vector is positive or negative is - Answer-determined if the circuit is more capacitate reactant or inductive reactant
Voltage is common - Answer-in a parallel circuit
If asked to determine...
NCATT AET LATEST EXAM QUESTIONS
WITH CORRECT DETAILED ANSWERS
GRADED A+
What determines whether the vector is positive or negative is - Answer-determined if the
circuit is more capacitate reactant or inductive reactant
Voltage is common - Answer-in a parallel circuit
If asked to determine impedance in a parallel cuircuit, you will need to determine -
Answer-the total current in the circuit
Resonance - Answer-a condition where the capacitive and inductive reactance of an LC
circuit are equal
RCL circuits are - Answer-the basis for the operation of tank circuits inside oscillators
Resonance operation refers to - Answer-the relationship between the total current of a
circuit as compared to the total impedance
A parallel RCL circuit is operating in resonance when - Answer-the total impedance is
maximum and the total current is at a minimum
Half-power points, bandwidth, bandpass, and circuit quality - Answer-can only exist in a
circuit operating at one resonance frequency
Bandwidth is established between - Answer-the upper half power point and the lower
half power point
Power points are at - Answer-70.7% of peak power
Bandwidth is - Answer-the frequency difference between the upper and lower half
power points
Bandpass is expressed as a - Answer-a range of the powerpoints between high and low
Circuit impedance is symbolized as - Answer-Z with Hpp subscript
Impedance half power points - Answer-are the two points on the impedance curve that
are 70.7% of the peak impedance value
,A parallel circuit is at resonance with - Answer-the impedance is at maximum and the
current is at a minimum
Q in a circuit is - Answer-a description of the quality of the circuit
Q is a ratio of the - Answer-bandwidth to the peak current curve
Q and the bandwidth are - Answer-inversely proportional
Circuits with a high Q - Answer-will have a narrow bandwidth
Circuits with a low Q - Answer-will have a wide bandwidth
Circuit quality equation - Answer-inductive reactance divided by resistance
The voltage of a capacitor in a parallel RCL circuit - Answer-is equal to the voltage at
the inductor
Since the capacitor and inductor are matched value wise in a parallel RCL circuit -
Answer-the impedance would be the same
The heart of an oscillator - Answer-tank circuit
Oscillator - Answer-what produces the carrier wave in most radios
Physically a tank circuit is - Answer-one inductor and one capacitor wired in parallel
Tank cirucits store energy - Answer-temporarily
Flywheel effect - Answer-the flowing of current between a capacitor and inductor in a
tank circuit
Tank circuits have how many frequencies that they will oscillate at - Answer-one
At resonance, a tank circuit will operate as - Answer-one component
No other current will flow as long as a circuit is - Answer-oscillating
Frequency is determined by - Answer-the capacitor and inductor of the circuit
Resonance frequency is equal to - Answer-the product of one half pi the square root of
the value of the inductor times the capacitor
Dampening wave - Answer-Each cycle of a tank circuit a little bit of energy is lost so
over time the amplitude of the sine wave will steadily decrease
, Regenerative feedback - Answer-the injection of the right amount of energy into the
circuit to maintain the amplitude
Transformer - Answer-transforms electrical energy into magnetic energy then back into
electrical energy again
Transformer operation depends on - Answer-electromagnetic induction between two
stationary coils and a magnetic flux of changing magnitude and polarity
Usual purpose of the transformer is - Answer-to transform one voltage to another
Transformers can change a higher - Answer-voltage with less current or lower voltage
with higher amps
Fundamental significance of a transformer - Answer-is its ability to step the voltage up
or down from the powered coil to the unpowered coil
Transformer process description - Answer-AC voltage is inducted in the unpowered
secondary coil equal to the AC voltage across the powered primary coil multiplied by the
ration of the secondrary coil turns to primary coil turns
When transmitting electrical power over long distances - Answer-it is far more effecient
to do so with stepped up voltages and stepped down currents and then step the voltage
back down and the current backup for the industry business or consumer use
Step down transformers - Answer-fewer turns in the secondary winding than in the
primary winding, the secondary voltage will be lower than the primary
Step up transformers - Answer-fewer turns in the primary winding than in the secondary
winding the secondary voltage will be higher than the secondary circuit
A semiconductor is - Answer-a device that only conducts electricity part of the time
What makes a semiconductor possible - Answer-the type of materials and how those
materials are constructed
Most semiconductors are constructed of either - Answer-germanium or silicon or some
similar crystalline type material
Semiconductor materials are produced by - Answer-growing them in round tubes that
are etched and doped with impurities to give them their semiconducting properties
Pure silicon or germanium by themselves are - Answer-not particularly good conductors
and in their pure state are insulators
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