Analog Electronics
The voltage gain of an amplifier without and with feedback are 100 and 20. The negative feedback is
Answer: A
or β = 0.04 or 4% .
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For a base current of 10 μA, what is the value of collector current in common emitter if βdc = 100
Answer: C
IC = 10 x 100 μA = 1 mA.
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In a BJT circuit a pnp transistor is replaced by npn transistor. To analyse the new circuit
Answer: D
All voltages and currents have reverse polarity.
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The dissipation at the collector is in the quiescent state and increases with excitation in the case of a
Answer: D
Only one transistor conducts without biasing.
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The quiescent collector current IC, and collector to emitter voltage VCE in a CE connection are the values when
Answer: A
Quiescent-operation means operation when ac signal is not applied.
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The parameter h11 for CB circuit is higher than that for CE circuit.
Answer: B
It is lower.
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In a voltage regulated power supply the zener operates in the breakdown region when (Vin is input voltage and Vz is zener breakdown voltage)
Answer: B
Zener breakdown when input voltage is more than zener breakdown voltage.
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A P-channel MOSFET operating in the enhancement mode is characterized by Vt = - 4 V and IDQ = - 10 mA, when VGSQ = - 5.5 V, what will be VGSQ if IDQ = -15 mA and ID, on = - 16 mA
Answer: C
No Explanation.
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When load is coupled to class A amplifier through transformer, efficiency decreases.
Answer: B
Transformer coupling increases efficiency.
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In a CE amplifier the input impedance is equal to the ratio of
Answer: A
Input is applied to base with emitter grounded. The input impedance is the ratio of ac base voltage to ac base current.
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