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ATT TEST 2 ACTUAL TEST 2025 | ALL QUESTIONS
AND CORRECT ANSWERS | ALREADY GRADED A+ |
VERIFIED ANSWERS | NEWEST VERSION
What are general purpose capacitors used to isolate one circuit from another, block unwanted signals and produce wave shapes? --------- CORRECT ANSWER-----------------Non-polarized capacitors What capacitor is polarity sensitive? Major use is filtering power supplies. -- -------CORRECT ANSWER-----------------Electrolytic capacitor What provides varying amounts of capacitance? Used in transmitters and receivers. ---------CORRECT ANSWER-----------------Variable capacitor What does the N indicate in the identification number 1N34A? --------- CORRECT ANSWER-----------------A solid state device What is the purpose of a transformer? ---------CORRECT ANSWER----------- ------Transfer power Transformers operate on the principle of _________. ---------CORRECT ANSWER-----------------Mutual inductance The input to a transformer is applied to one coil called _____________. ---- -----CORRECT ANSWER-----------------Primary
What is from a power source to a load or from one circuit to another? --------
- CORRECT ANSWER-----------------The power transfer The output of a transformer is taken from the other coil which is called ______________. ---------CORRECT ANSWER-----------------Secondary What transformers are mostly used in power supplies? ---------CORRECT ANSWER-----------------Iron core What transformer are often used in radio circuits? ---------CORRECT ANSWER-----------------Air core What type of amplifier configuration has the input applied to the emitter and the output taken from the collector? ---------CORRECT ANSWER-------------- ---Common Base (T/F) Transformers can reverse the phase of the applied AC voltage or sine wave. ---------CORRECT ANSWER-----------------True What is the basic unit of capacitance? ---------CORRECT ANSWER----------- ------The Farad (F)
The cathode of a diode is represented by _____________. --------- CORRECT ANSWER-----------------A bar For a function generator, which modification of the output signal changes the amount of DC voltage? ---------CORRECT ANSWER-----------------DC offset In the frequency section of a function section of a function generator, what do the range switches select? ---------CORRECT ANSWER----------------- The multiplier for the frequency dial Most of the current carriers in a commonly biased transistor flow from the _____________. ---------CORRECT ANSWER-----------------Emitter to the collector Frequency generators are used to ____________. ---------CORRECT ANSWER-----------------Provide known signals to check circuit operation The frequency switches of counter select between ________________. ---- -----CORRECT ANSWER-----------------Check, totalize, period, and frequency ranges What is the ATTENUATION control used for a frequency counter? --------- CORRECT ANSWER-----------------Reduces the input signal by a factor of 20
What compares the number of turns in the primary to the number of turns in the secondary? ---------CORRECT ANSWER-----------------Turns in ratio What is inverse of both voltage and the turns ratio in transformers? --------- CORRECT ANSWER-----------------Current What occurs when there is a break in primary or secondary coil of the transformer? ---------CORRECT ANSWER-----------------Opens Frequency counters determine the ______________. ---------CORRECT ANSWER-----------------Period of one cycle in a signal The basic unit of inductance ______________. ---------CORRECT ANSWER-----------------Henry (H) An open in the primary of a transformer ______________. --------- CORRECT ANSWER-----------------No current flow in the secondary The inductor is used to ____________. ---------CORRECT ANSWER--------- --------Concentrate a magnetic field What adds a DC voltage to the AC input signal? ---------CORRECT ANSWER-----------------Clampers
The physical appearance of inductors _____________. ---------CORRECT ANSWER-----------------Varies Inductors have the value of their inductive capacity indicated by ______________. ---------CORRECT ANSWER-----------------Print or color code on the body of the inductor Inductors are commonly identified by their ______________. --------- CORRECT ANSWER-----------------Core type If the ____________ has a short the output voltage decreases. --------- CORRECT ANSWER-----------------Secondary The capacitor is used to _____________. ---------CORRECT ANSWER------ -----------Stores an electrical charge A partial short in the primary of a transformer... ---------CORRECT ANSWER-----------------Increases secondary voltage Which element in a translate is used to produce a large number of current carriers? ---------CORRECT ANSWER-----------------Emitter
An open is the primary of a transformer causes no output voltage because _______________. ---------CORRECT ANSWER-----------------The open prevents magnetic fields from developing The most common faults found in transformers are ____________. --------- CORRECT ANSWER-----------------Shorts and opens Which element in a transmitter is used to pass most of the current carriers? ---------CORRECT ANSWER-----------------Base In an NRN transistor, the base DC bias voltage must be _______. --------- CORRECT ANSWER-----------------Positive compared to the emitter Which amplifier has the best efficiency? ---------CORRECT ANSWER-------- ---------Class C Electrolytic capacitors are ____________. ---------CORRECT ANSWER----- ------------Polarized What are the dielectric types used by capacitors? ---------CORRECT ANSWER-----------------Electrolytic, ceramic, and film When an input is applied across the emitter to base PN junction, what is the relative resistance? ---------CORRECT ANSWER-----------------Low
Transistor amplifiers require what type of signals to functions? --------- CORRECT ANSWER-----------------DC bias and AC input signals What amplifiers are biased so the input signal occurs within the limits of cutoff and saturation? ---------CORRECT ANSWER-----------------Class A What changes are necessary for amplification to occur? ---------CORRECT ANSWER-----------------Small change in Eb and large change in Ic What amplifiers are biased so collector current is zero for half, (one alteration) of the input signal? ---------CORRECT ANSWER----------------- Class B What amplifiers are biased so that collector current is zero for a portion of one alteration? ---------CORRECT ANSWER-----------------Class AB What amplifiers are biased so that collector current is zero for most of the input cycle? ---------CORRECT ANSWER-----------------Class C ___________ an amplifier distorts the output signal. ---------CORRECT ANSWER-----------------Overdriving Which amplifier has best fidelity? ---------CORRECT ANSWER----------------- Class A
In which direction do holes appear to move? ---------CORRECT ANSWER-- ---------------Opposite of electrons Which quantity cannot be measured directly or derived using an oscilloscope? ---------CORRECT ANSWER-----------------Resistance What value of AC voltage does an oscilloscope directly measure? --------- CORRECT ANSWER-----------------Peak to peak What are oscilloscopes used to measure? ---------CORRECT ANSWER----- -------------Wave shape
- Amplitude
- Period Induction occurs when ___________. ---------CORRECT ANSWER----------- ------A conductor passes through a magnetic field A cutoff transistor acts like? ---------CORRECT ANSWER-----------------It is an open Peak voltage of a sine wave is ______________. ---------CORRECT ANSWER----------------- 10
_______________ is calculated by measuring from the most positive to the most negative point of the sine wave. ---------CORRECT ANSWER------------ -----Peak to Peak What is the amount by which wave-forms lead or lag one another? --------- CORRECT ANSWER-----------------Phase angle Which amplifier configuration has the best properties for an amplifier? ------- --CORRECT ANSWER-----------------Common emitter The phase angle of two wave-forms is expressed using two vectors called _____________. ---------CORRECT ANSWER-----------------Phasors When forward biased the diode acts as a? ---------CORRECT ANSWER----- ------------Closed switch Wave-forms that are not plotted in a 360 degree radius are called ____________. ---------CORRECT ANSWER-----------------Non-sinusoidal AC wave-forms Combining harmonic frequencies with the fundamental frequency produces ___________. ---------CORRECT ANSWER-----------------Non-sinusoidal wave-forms The _____________ is referred to as the linear increase or decrease. ------- --CORRECT ANSWER-----------------scope
What values state the usable amount of voltage being produced? --------- CORRECT ANSWER-----------------Average and RMS RMS (Root Mean Square) multiplier ---------CORRECT ANSWER-------------- ---.707 x VP N type material has ___________. ---------CORRECT ANSWER--------------- --Free electrons What is a function generator used for? ---------CORRECT ANSWER---------- -------Producing AC signals The time it take to complete one cycle is called ____________. --------- CORRECT ANSWER-----------------Period What is the reference designator for the inductor? ---------CORRECT ANSWER-----------------L What is a component that has the ability to concentrate a magnetic field? -- -------CORRECT ANSWER-----------------The inductor To induce voltage in an inductor, the current flow must be? --------- CORRECT ANSWER-----------------Increasing or decreasing
As current ____________ the inductor increases circuit current. --------- CORRECT ANSWER-----------------Decreases What is the ability of a conductor to induce (generate) voltage "cut" by magnetic flux. ---------CORRECT ANSWER-----------------Inductance What is the basic unit of inductance? ---------CORRECT ANSWER------------ -----The Henry (H) What stores energy in an electrostatic field between the charged capacitor plates? ---------CORRECT ANSWER-----------------A capacitor What prevents current flow between the plates? ---------CORRECT ANSWER-----------------Di-electric How is a battery connected to forward bias of a diode? ---------CORRECT ANSWER-----------------Negative side to cathode, Positive side to anode What is used in power supplies to convert AC voltages to pulsating DC voltages? ---------CORRECT ANSWER-----------------Rectifiers What is a component that has the ability to store an electrical charge? ------ ---CORRECT ANSWER-----------------Capacitor
(T/F)
Electrons travel through the capacitor? ---------CORRECT ANSWER---------- -------False What is an insulator that blocks electrons? ---------CORRECT ANSWER----- ------------Di-electric The ___________ of the capacitor changes at the same frequency as the applied voltage. ---------CORRECT ANSWER-----------------Polarity A complete short in the secondary of transformer ____________. --------- CORRECT ANSWER-----------------Eliminates secondary voltage Where is the capacitor charge stored? ---------CORRECT ANSWER---------- -------In an electrostatic field between the plates ____________ in the secondary eliminates the output voltage. --------- CORRECT ANSWER-----------------Complete shorts The unit of measure for inductors is the _________. ---------CORRECT ANSWER-----------------Henry (H) What type of materials have holes? ---------CORRECT ANSWER-------------- ---P type
Any voltage less than _________ will keep the silicon diode from conducting. ---------CORRECT ANSWER-----------------.7 volts What is made from semiconductor materials that have the properties of conductors and insulators? ---------CORRECT ANSWER----------------- Diodes In a diode current flows in what direction? ---------CORRECT ANSWER------ -----------1 Direction Current flows from the __________ to the anode, but not from the ______ to the cathode. ---------CORRECT ANSWER-----------------Cathode Aniode
