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Electronics

384 questions · page 14 of 20. Answer in your head first, then check the solution.

📘 EE Mock Board Exam
#261
The common base amplifier has _____ compared to CE and CC amplifier.
Aa lower input resistance
Ba larger current gain
Ca larger voltage gain
Da higher input resistance
#262
When a FET with a lower transconductance is substituted into a FET amplifier circuit, what happens?
Athe current gain does not change
Bthe voltage gain decreases
Cthe circuit disamplifies
Dthe input resistance decreases
#263
In the zero signal conditions, a transistor sees _____ load.
Adc
Bac
Cboth dc and ac
Dresistive
#264
The current in any branch of a transistor amplifier that is operating is
Aac only
Bthe sum of ac and dc
Cthe difference of ac and dc
Ddc only
#265
An ideal differential amplifiers common mode rejection ratio is
Ainfinite
Bzero
Cunity
Dundetermined
#266
An open fuse circuit has a resistance equal to
Azero
Bunity
Cat least 100ohm(s) at standard temperature
Dinfinity
#267
What is the purpose of dc conditions in a transistor?
Ato reverse bias the emitter
Bto forward bias the emitter
Cto set up the operating point
Dto turn on the transistor
#268
The ac variation at the output side of power supply circuits are called _____.
Aripples
Bpulses
Cwaves
Dfilters
#269
What is the purpose of emitter capacitor?
Ato forward bias the emitter
Bto reduce noise in the amplifier
Cto avoid voltage drop in gain
Dto stabilize emitter voltage
#270
A common emitter circuit is also called _____ circuit.
Agrounded emitter
Bgrounded collector
Cgrounded base
Demitter follower
#271
The output signal of a common-collector amplifier is always
Alarger than the input signal
Bin phase with the input signal
Cout of phase with the input signal
Dexactly equal to the input signal
#272
What is the ideal maximum voltage gain of a common collector amplifier?
Aunity
Binfinite
Cindeterminate
Dzero
#273
The output power of a transistor amplifier is more than the input power due to additional power supplied by
Atransistor
Bcollector supply
Cemitter supply
Dbase supply
#274
When a transistor amplifier feeds a load of low resistance, its voltage gain will be
Alow
Bvery high
Chigh
Dmoderate
#275
The capacitors are considered _____ in the ac equivalent circuit of a transistor amplifier.
Aopen
Bpartially open
Cshort
Dpartially short
#276
For highest power gain, _____ configuration is used.
ACC
BCB
CCE
DCS
#277
What is the most important characteristic of a common collector amplifier?
Ahas high input voltage
Bhas high input resistance
Chas high output resistance
Dit is an amplifier circuit
#278
Which of the item below does not describe a common emitter amplifier.
Ahigh voltage gain
Bhigh current gain
Cvery high power gain
Dhigh input resistance
#279
CC configuration is used for impedance matching because its
Ainput impedance is very high
Binput impedance is very low
Coutput impedance is very low
Doutput impedance is zero
#280
Which of the following is the other name of the output stage in an amplifier?
Aload stage
Baudio stage
Cpower stage
DRF stage

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