ETestQuestions2
6.84 Vp
(See Figure) Calculate Vr2
20V
(See Figure) How much voltage does the resistor drop
It increases
(See Figure) IF the operating frequency increases, how does the current change
High Pass Filter
(See Figure) IF the output were taken across the resistor, the circuit would be known as a
increases
(See Figure) If R1 shorts, Vr2 = ___
increases
(See Figure) If the frequency increase, the phase angle:
It decreases
(See Figure) If the operating frequency increase, how does the phase angle change?
decreases
(See Figure) If the resistance decreases, the bandwidth
Low Pass filter
(See Figure) The circuit is known as a
D and F
(See Figure) Vpp is measured between points ___
85hz
(See Figure) What is the cutoff frequency?
10mA
(See Figure) What is the primary current if Is = 40 mA and the turns ratio equals 4:1
The RMS voltage
(See Figure) Which one of the following represents the value at point G?
IL lags IR
(See Figure) Which statement describes the relationship of IL and IR?
Low Pass Filter
(See Figure)The circuit in this figure is known as a ___
15.6V
(See Figure)What is the output voltage at the cutoff frequency?
T
A capacitor blocks dc and passes ac
All of these
A center tap transformer has a connection at the midpoint of the secondary winding resulting in
T
A high pass filter will cause some phase shifting of the signal
T
A series RLC circuit can be configured for band-pass or band-stop filtering purposes.
T
A sine wave's frequency equals the reciprocal of the period
F
A sine wave's peak value is smaller than its RMS value
T
A step-down transformer could have a primary secondary turns ratio of 4:1
F
An ohmmeter can be used to accurately test the impedance of an RL circuit
T
As the frequency applied to an RC circuit increases, the impedance decreases
T
At resonance, Xc equals XL
F
Capacitance is the ability to store voltage
F
Current flows both ways simultaneously in an AC circuit
F
Electrolytic capacitors are ideal for AC applications
5.17s
How long will it take for a 22uF capacitor to completely charge through a 47K resistor?
12.6 V
IF a 1 uF capacitor and a 10k resistor are connected in series across 20V. Approximately how much voltage will the capacitor drop after charging for just one time constant?
very high
IF a tuned tank circuit has a very narrow bandwidth, its Q is probably
A near dc voltage of about half the square wave voltage.
IF an RC integrator uses a 47uF capacitor, a 12K resistor and a square wave input with a frequency of 200 kHZ, its approximate output is
constantly changing
IF an inductor has an ac current flowing through it, the magnetic field is:
increases
IF the resistor shorts, the current
829mA
If a 22uF capacitor is connected to a 15V 400Hz source, its current equals
F
If a DC voltage is input to a transformers primary, then an ac voltage is induced in its secondary,
F
The total inductance of two parallel inductors equals the sums of their inductance values
T
The voltage leads the current in an inductive circuit
103 ms
What is one time constant of a 4.7uF capacitor in series with a 22K resistor
0.01uF
What is the capacitance of a capacitor that drops 50V and stores 0.500uC of charge
9420ohm
What is the inductive reactance of a 150mH inductor operating at 10kHz
50 V
What is the source voltage in a series resonant circuit if Vc =150V Vl=150V and Vr = 50V
65mH
What is the total inductance if a 50mH inductor is connected in series with a 15mH inductor?
Towards the negative side of the source
When connecting a large electrolytic capacitor to a circuit with a 100 Vdc source, place the negative end of the capacitor
F
When the input pulse width to an RC integrator is much less than 5pi, the output approaches the shape of the input
None of the above
With three capacitors in series, the current lags the voltage by