Test
Electronics EASA - Transistors 2
Este test tiene tiempo límite, así que se abre en el reproductor de siempre.
Preguntas del test (31)
1A silicon bi-polar transistor with two depletion zones.
- Aoperates by varying electric fields.
- Bis a voltage operated device.
- Cconsists of 3 slices of semiconductor material.
2To decrease the voltage gain of a common emitter amplifier you would increase
- Abase circuit.
- Bemitter circuit.
- Ccollector circuit.
3Which mode of operation provides the best high frequency response? Common.
- Aemitter.
- Bbase.
- Ccollector.
4A FET when compared to a junction transistor is.
- Alow impedance.
- Bcurrent operated.
- Chigh impedance.
5One characteristic of the emitter follower is
- Alow resistance output
- Blow current amplification.
- Chigh voltage amplification.
6An amplifier current gain will be slightly less than 1, but its voltage gain will be high, if it is connected in the.
- Acommon base configuration
- Bcommon emitter configuration.
- Ccommon collector configuration.
7The common collector amplifier is sometimes called the emitter follower circuit because.
- Athe emitter voltage follows the collector voltage.
- Bthe emitter current follows the collector current.
- Cthe emitter voltage follows the base voltage.
8Amplifiers may be classified as
- Avoltage amplifiers or power amplifiers.
- Bvoltage amplifiers or impedance amplifiers.
- Ccommon emitter or common collector amplifiers.
9An amplifier can provide both voltage gain and current gain when it is connected in the.
- Acommon collector configuration.
- Bcommon emitter configuration.
- Ccommon base configuration.
10How do you increase voltage gain of an amplifier?.
- Adecrease base circuit bias.
- Bdecrease input resistance.
- Cdecrease output resistance.
11The input and output signals of a common emitter amplifier are.
- Ain phase.
- Bequal.
- Cout of phase.
12 In a FET, the junction connections are called.
- Adrain, source and gate
- Bdrain, collector and junctions.
- Cbase, collector and emitter
13How is a push-pull transistor arrangement connected?.
- ACollector to collector.
- BEmitter to emitter.
- CBase to base.
14Thermal runaway in a transistor is caused by.
- Aexcessive heat causing maximum current flow.
- Bexcessive heat causing minimum current flow.
- Clow heat causing minimum current flow.
15An advantage of a common emitter is.
- Ait has high power gain.
- Bit is a voltage follower.
- Cit has high voltage gain.
16When testing a transistor with an ohmmeter, what is the resistance of the emitter/collector?.
- ALow resistance both ways.
- BHigh resistance one way.
- CHigh resistance both ways.
17A transistor at saturation has
- Alow resistance.
- Bzero resistance.
- Chigh resistance.
18A capacitor-resistor coupled multistage amplifier lets.
- ADC pass only.
- BAC and DC pass to the next stage
- CAC pass only.
19A JFET is.
- Aeither of the above depending on resistance in the circuit
- Bcurrent sensitive.
- Cvoltage sensitive.
20Which mathematical operation is performed by a modulator amplifier?.
- AAddition.
- BSubtraction.
- CMultiplication.
21Resistors and capacitors are used to couple stages of amplifiers so that.
- Aonly DC can be applied.
- Bonly AC can be applied.
- Cequal amounts of AC and DC can be applied.
22An advantage of a FET when compared to a bi-polar transistor is.
- Athe switching time is quicker.
- Bthe input resistance is higher.
- Cthe input resistance is lower.
23A Common Collector circuit has the following characteristics.
- AMedium Voltage Gain, High Current Gain, Non-Inverted Output.
- BLow Voltage Gain, High Current Gain, Inverted Output.
- CMedium Voltage Gain, Low Current Gain, Inverted Output
24In a Common Emitter Amplifier RE is used for.
- Aload control.
- Bbiasing.
- Cstabilisation
25A transistor in Common Emitter mode gives
- Ahigh voltage gain only.
- Bhigh current gain only.
- Chigh power gain.
26For a transistor in common emitter mode, the term Hfe indicates.
- Athe Voltage gain Vce/Vbe at Ib constant.
- Bthe Power gain Pin/Pout.
- Cthe current gain Ic/Ib at Vce constant.
27In a differential amplifier the term 'common mode voltage' means
- Aoutput voltage with one input connected to common ground
- Boutput voltage with non-inverting input at 0 volts.
- Coutput voltage when both inputs have equal voltages
28In an ideal current amplifier.
- Ainput impedance must be low and output high.
- Binput impedance must be high and output low.
- Cboth input and output impedances must be low.
29In an ideal voltage amplifier.
- Ainput impedance must be high and output impedance low.
- Binput impedance must be low and output impedance high
- Cinput impedance must be low and output impedance low.
30The term ICE related to transistor in common emitter mode means.
- Aleakage current flowing between Collector and Emitter with Base open circuited.
- Bforward current between Collector and Emitter with Base connected to signal.
- Cleakage current between Collector and Emitter with Base connected to ground.
31A common base amplifier has.
- Ahigh input and high output impedance.
- Blow input and high output impedance.
- Clow input and medium output impedance.
Información
- Descripción
- Test sobre Electronics EASA - Transistors 2, creado por Ahidul Hoque el 27/02/2016.
- Autor
- Ahidul Hoque
- Idioma
- English
- Visitas
- 3
- Valoración
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