ELECTRONIC CIRCUIT ANALYSIS
1.SINGLE STAGE AMPLIFIERS
1.Parameter hfe of a typical transistor is of the order of [ ]
a)5 b)50 c)500 d)2000
2. Parameter hie of a typical transistor is of the order of [ ]
a)100Ω b)1000Ω c)10kΩ d)100kΩ
3. Parameter hre of a typical transistor is of the order of [ ]
a)2.5*10-6 b)2.5*10-5 c)2.5*10-4 d)2.5*10-3
4. Parameter hoe of a typical transistor is of the order of [ ]
a)2.5µs b)2µs5 c)250µs d)2.5ms
5.Input resistances of ideal voltage amplifier & ideal current amplifier are [ ]
a)∞,0 b)0,∞ c)∞,∞ d)0,0
6.The following transistor configurations gives useful current gain [ ]
a)CE alone b)CC alone c)both CB&CC d)both CE &CC
7.Current gain of small signal transistor amplifier stage equals [ ]
a)-hf/(1+hozL) b) +hf/(1+hozL)
c)-hi/(1+hozL) d) )+hi/(1+hozL)
8.Transistor amplifier stage has highest input impedance in [ ]
a)CB configuration b)CE configuration
c)CC configuration d)none
9. Transistor amplifier stage has lowest input impedance in [ ]
a)CB configuration b)CE configuration
c)CC configuration d)none
10.The current gain of transistor amplifier is lowest in [ ]
a) CB b)CE c)CC d)none
11. The voltage gain of transistor amplifier is lowest in [ ]
a) CB b)CE c)CC d)none
12.Ignoring the biasing network ,Darlington emitter follower has input resistance of the order of [ ]
a)20kΩ b)200kΩ c)2MΩ d)20MΩ
13.In aCE amplifier stage on introducing a resistor REin the emitter circuit the input resistance Ri [ ]
a)remains unaltered b)reduces c)increases nominally d)increases very much
14.The unit of output conductance is [ ]
a)mho b)ohm c)ampere d)dimensionless
15.The h-parameter of CE transistor has greatest value of [ ]
a) hfe b) hie c) hre d) hoe
16. The h-parameter of CE transistor has smallest value of [ ]
a) hfe b) hie c) hre d) hoe
17.The distortion that produces a new frequency components at the output of an amplifier [ ]
a)frequency distortion b)harmonic distortion c)phase distortion d)delay distortion
18. The distortion that produces different amplification for different frequency components is [ ]
a)frequency distortion b)harmonic distortion c)phase distortion d)delay distortion
19.The amplifier that gives both voltage ¤t gain is [ ]
a) CB b)CE c)CC d)none
20.The amplifier that gives power gain approximately equal to current gain is [ ]
a) CB b)CE c)CC d)none
21. The amplifier that gives power gain approximately equal to voltage gain is [ ]
a) CB b)CE c)CC d)none
22. The amplifier that gives 180▪ voltage phase shift is [ ]
a) CB b)CE c)CC d)none
23. The amplifier that gives maximum power gain is [ ]
a) a) CB b)CE c)CC d)none
24.An ideal amplifier has [ ]
a)has ∞ voltage gain b)has ± feedback
c)gives uniform frequency response d)respond to signal at its input terminal
25.An emitter follower is used as [ ]
a)as a power amplifier b)an impedance matching device
c)low i/p impedance circuit d)a follower of base signal
2.MULTI STAGE AMPLIFIERS
1.The cascode amplifier has the combination of [ ]
a)CE-CCb)CE-CBc)CB-CEd)CC-CE
2.The multistage amplifier in low frequency range behaves like a [ ]
a)low pass circuit b)high pass circuit c)band passs circuit d)all pass circuit
3. The multistage amplifier in high frequency range behaves like a [ ]
a)low pass circuit b)high pass circuit c)band passs circuit d)all pass circuit
4.The frequency range of an amplifier between lower &upper 3dB requencies is called an [ ]
a)beam width b)bandwidth c)line width d)all the above
5.the configuration commonly used in intermediate stages of an multistage amplifier is [ ]
a) CE b) CB c) CC d)all the three
6. The cascode amplifier finds wide application in [ ]
a)audio amplifier b)video amplifier c)narrow band amplifier d)all the above
7.The darlingthon pair is called [ ]
a)super alpha transistor b) super gamma transistor c) super beta transistor d)none
8.The gain of cascaded amplifier is equal to the [ ]
a)sum of individual gains b)product of individual gains c)ratio of stages gains d)none
9.If the four stages of a multistage amplifier have individual gains of 5 dB ,10dB ,15dB,20dB then
the total gain is [ ]
a)30dB b)50dB c)150db d)750dB
10.The frequency response of transformer coupled amplifier is [ ]
a)poor b)good c)excellent d)none
11.If the voltage gain of an amplifier is 100 then its gain in dB is [ ]
a)10 b)20 c)40 d)none
12.The Darlington pair is used for [ ]
a)reducing distortion b)wide &voltage amplification c)impedance matching d)power amplification
13. The Darlington pair has two stages of [ ]
a) CE&CC b)both CE c)both CC d)CE &CB
14.The coupling that produces minimum interference with frequency response is [ ]
a)direct coupling b)impedance coupling c)RC coupling d)transformer coupling
15.To amplify a signal in the range between 550khz &1600khz ,the appropriate amplifier is [ ]
a)RC coupled amplifier b)transformer coupled amplifier c)direct coupled amplifier d)none
16.The lower 3-dB frequency of an n-stage amplifier with noninteracting stages equals [ ]
a)fl/(21/n -1)0.5 b)fl*(21/n -1)0.5 c)fl/n d)n*fl
17.The higher 3-dB frequency of an n-stage amplifier with noninteracting stages equals [ ]
a)fH*(21/n -1)0.5 b )fH/(21/n -1)0.5 c)n*fH d)fH/n
18.In an RC coupled amplifier ,typical value of coupling capacitor is [ ]
a)1000Pf b)0.1µf c)0.01µf d)10µf
19.in a cascade amplifier the coupling method capable of providing highest gain is [ ]
a) RC coupling b) DC coupling c) transformer coupling d)inductor coupling
20. Transformer coupling provides high efficiency because the [ ]
a)collector voltage is stepped up b)dc resistance in collector circuit is low
c) collector voltage is stepped down d)flux linkages are incomplete
21.The 3-dB frequency of an amplifier is one at which gain reduces to [ ]
a)unity b)zero c)0.707 of its midband value d)half of its midband value
22.In a R.C coupled amplifier ,the reduction in voltage gain in the high frequency range results due to[ ]
a)coupling capacitor b)shunt capacitance in the input circuit c) shunt capacitance in the output circuit d)By pass capacitor in the self bias circuit
23. In a R.C coupled amplifier ,the reduction in voltage gain in the low frequency range results due to[ ]
a)coupling capacitor b)shunt capacitance in the input circuit c) shunt capacitance in the output circuit d)By pass capacitor in the self bias circuit
24.In an R.C coupled amplifier ,the low 3-dB frequency may be reduced by [ ]
a)Reducing the value of coupling capacitor
b)increasing the value of coupling capacitor
c)Reducing the total effective shunt capacitance
d)increasing the total effective shunt capacitance
25. In an R.C coupled amplifier ,the high 3-dB frequency may be increased by [ ]
a)Reducing the value of coupling capacitor
b)increasing the value of coupling capacitor
c)Reducing the total effective shunt capacitance in the output circuit
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