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CET Associate Certified Electronics Technician CIE book Questions and Answers 100% Pass, Exams of Electronics

Three Colors for a 10 ohm resistor Brown Black Brown Three Colors for 4.7 ohm resistor Yellow Violet Gold Two Terminal current control circuit device rheostat 12 Volt battery across red red red resistor, mW dissipated by resistor .65.5 mW Resistance Equivalency formula R1 x R2/R1+R2 The larger the capacitor, the smaller/larger the voltage drop smaller Most common use of capacitors is to store ___________ energy

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CET Associate Certified Electronics
Technician CIE book Questions and
Answers 100% Pass
Three Colors for a 10 ohm resistor
Brown Black Brown
Three Colors for 4.7 ohm resistor
Yellow Violet Gold
Two Terminal current control circuit device
rheostat
12 Volt battery across red red red resistor, mW dissipated by resistor
.65.5 mW
Resistance Equivalency formula
R1 x R2/R1+R2
The larger the capacitor, the smaller/larger the voltage drop
smaller
Most common use of capacitors is to store ___________
energy
pf3
pf4
pf5
pf8
pf9
pfa
pfd

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Download CET Associate Certified Electronics Technician CIE book Questions and Answers 100% Pass and more Exams Electronics in PDF only on Docsity!

CET Associate Certified Electronics

Technician CIE book Questions and

Answers 100% Pass

Three Colors for a 10 ohm resistor

Brown Black Brown

Three Colors for 4.7 ohm resistor

Yellow Violet Gold

Two Terminal current control circuit device

rheostat

12 Volt battery across red red red resistor, mW dissipated by resistor

.65.5 mW

Resistance Equivalency formula

R1 x R2/R1+R

The larger the capacitor, the smaller/larger the voltage drop

smaller

Most common use of capacitors is to store ___________

energy

When plates of a series -resonant tuning circuit are moved closer together, the resonant frequency of the turned circuit increase/decrease

decrease. Moving plates closer together increases capacitance which decreases the resonant frequency fc= 1/2π√LC

True or False, the purpose of a 0.01 μF capacitor in parallel with a filter capacitor is to increase the capacitance

False, it is to offer a low reactance path to high frequency transients

A 0.05 μF capacitor is connected in series with a 0.08 μF capacitor. The series circuit has a capacitance of

.05x.08/.05+.08 μF = .031 μF

Inductors store energy in the form of a ___________ field

electromagnetic field

To prevent electrostatic coupling between the primary and secondary windings, power transformers are sometimes equipped with a ____________ shield

Faraday shield

The dot notation on a transformer tells which points are (in phase)(equal to current)

in phase

Name two types of transformers that can be used as preregulators

ferroresonant and self saturating

T=L/R

In a conventional JFET amplifier circuit, the input signal is at the ______ and the output is at the


gate, drain

The emitter resisitor in a conventional bipolar amplifier circuit is used for ___

temperature compensation

Why is a resistor always connected in series with an LED?

to protect the LED from high current

A series RC circuit is connected to a 20-V battery. How long will it take the capacitor to charge to 12.6 V if R = 10 K Ω and C = .08 μF

8 ms

name the 9 resistor colors in order 0 - 9

black brown red orange yellow green blue violet gray white

3:resistors in parallel, br bl au, r,r,au or, or au what is value?

1.0 and 2.2 and 3.3. GT= 1/1+1/2.2+1/3.3 = 1.7575. 1/1.7575 =.

what's the conductance GT of this parallel circuit

1.75 mhos

A lamp is rated 12 volts and .5 Watts when a 6 volt battery is connected across it how brightly will it glow?

18 watts or 1/4 rated brightness of 72 watts. remember P= E^2/R

Two lamps are to be connected in series lamp#1 12V 0.25 A lamp#2 12V .125A. which lamp should be connected in parallel with a resistor?

lamp 2

how many ohms should resistor be?

96 ohms. derive resistance from power law and ohms law

What is the RMS value of a pure sine wave current with an average value of 7.5 A

8.3 A. RMS to average value is .707/.636 = 1.11 times 7.5 = 8.3 A

In a series tuned circuit, increasing the capacitance will increase/decrease the resonant frequency

decrease

write the equation for a the resonant frequency of a series resonant circuit

1/2π√RC

write the equation for the resonant frequency of a parallel resonant circuit

1/2π√RC

increasing the resistance of a resistor that's connected across a parallel LC circuit will produce a (broader)(narrower) response curve

narrower. in a parallel circuit you are increasing the Q

can you affect resonant frequency in a low Q circuit by increasing the resistance?

yes

the total current flows through the base/collector/emitter

emitter IE=IB+IC

when a transistor is operated Class B--

the transistor is cut off in the absence of an input signal

increasing the capacity of the capacitor in a UJT circuit will increase/decrease the frequency of it's operation

decrease

device that imitates parallel SCR's

triac

the intrinsic standoff ratio is adjustable in a device called

PUT programmable unijunction transistor. the break over point is adjusted by setting the intrinsic standoff ratio

the totem pole/Darlington amplifier uses both PNP and NPN transistors

totem pole

what type of amplifier is called a beta squared amplifier?

Darlington

in a certain operational amplifier circuit, the feedback resistor is 15k ohms and the input resistor is 5k ohms. what's the gain of the amplifier if the signal is applied to inverting input?

-r2/r1 -15k/5k = -

definition of a Class A amplifier

A Class A power amplifier is one in which the output current flows for the entire cycle of the AC input supply. Hence the complete signal present at the input is amplified at the output.

in a Class A amplifier, what should the ratio of applied voltage to collector voltage?

collector voltage is half of applied voltage in Class A amplifier

quick test method for a Class A amplifier

connect voltmeter from collector to ground and short circuit emitter to base junction. transistor no longer conducts, and voltage at collector will equal applied voltage

equation to determine the bandwidth of frequency response with the square wave test

bandwidth= 0.35/rise time

square wave input to amplifier with excessive high frequency response, amplifier is ringing

what kind of distortion to the square wave is caused by problems with low frequency response?

distortions in the horizontal or flat side of the square wave form

prescaler

to view two waveforms simultaneously on an oscilloscope you use

an electronic switch

equation for the time constant of a series RL circuit

T=L/R

What is the equation for transistor current

Ic + Ib = Ie

Value of generator voltage when 3V across a resistor and 3V across a capacitor

4.2 (RMS)

In a parallel turned circuit, what affect will a change in resistance R have on resonant frequency and bandwidth?

It will change the resonant frequency and bandwidth?

Which component besides a zener diode operates with a reverse voltage?

varactor diode

What component is a protector against excessive voltage?

VDR

what's the impedance of a series rc circuit with a 10ohm XC capacitor and 10 ohm resistance?

14.14 ohms

what besides a zener diode operates with a reverse bias?

varactor diode

You'd expect to see a current source used in a

Differential amplifier

What is the equivalent of parallel SCR's?

triac

What is the gain-bandwidth product for a transistor?

it's a frequency value

In an oscillator circuit, what kind of waveform is at variable resistor?

sawtooth wave

If the power lione frequency is Hz, what is the ripple frequency of a bridge rectifier?

120 Hz

The output signal is 180° out of phase with the input in the

Common source circuit

What common configuration in a transmitter has a high input impedance and low output impedance?

collector current divided by base current

In a transistor amplifer, the gain can be increased by

in some cases increasing the base current, in some cases decreasing the base current