Q261
Open questionIn a Wien bridge oscillator, the positive feedback attenuation is
Select an option to see the answer and solution.
ECE · all questionsAnalog Electronics
Analog Electronics
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
377
Questions
14/19
Page
Pick an option on a question to see the right answer and solution.
Q262
Open questionWhich one of the following multivibrators does not required input clock pulse or trigger?
Select an option to see the answer and solution.
Q263
Open questionThe MOSFET switch in its on-state may be considered equivalent to:
Select an option to see the answer and solution.
Q264
Open questionThe Zener diode in the regulator circuit shown in the figure has a Zener voltage of 5.8 volts and a Zener knee current of 0.5 mA. The maximum load current drawn from this circuit ensuring proper functioning over the input voltage range between 20 and 30 volts, is
Select an option to see the answer and solution.
Q265
Open questionA power transfer used in class A amplifier has zero signal power dissipation of 10 Watts. If the AC power is 4 W. Calculate collector efficiency.
Select an option to see the answer and solution.
Q266
Open questionWith reference to the negative feedback voltage - series configuration, which of the following statements is/are correct?
1. Bandwidth increases.
2. Non-linear distortion decreases.
Select correct answer.
1. Bandwidth increases.
2. Non-linear distortion decreases.
Select correct answer.
Select an option to see the answer and solution.
Q267
Open questionWhat is the output voltage V0 of the above circuit?
Select an option to see the answer and solution.
Q268
Open questionIn figure T1, T2 and T3 are p-channel MOS transistors, and T4, T5 and T6 are n-channel MOS transistors. A, B and C are binary signals. The output f(A, B, C) is
Select an option to see the answer and solution.
Q269
Open questionOPAMP circuit given below is a . . . . . . . .
Select an option to see the answer and solution.
Q270
Open questionFor a class-A power amplifier, supply dc voltage is ± 12 V, the quiescent collector current is 72 mA and the load resistance is 100 Ω. If the output voltage across the load is 12 V peak-to-peak, the efficiency of the amplifier is (neglect the loss occurring in the biasing resistors):
Select an option to see the answer and solution.
Q271
Open questionThe r.m.s. value of half wave rectified current is 50A. Its r.m.s. value for full wave rectification would be
Select an option to see the answer and solution.
Q272
Open questionHow many stages are involved in bipolar op-amp?
Select an option to see the answer and solution.
Q273
Open questionConsider the above circuit, for Vi = Vm sinωt, the output voltage V0 for RL → ∞ will be:
Select an option to see the answer and solution.
Q274
Open questionIn the base biased transistor circuit, the junction temperature may vary from 25°C to 75°C. If β increase from 100 to 150 with raising temperature, percentage change in VCE point will be
Select an option to see the answer and solution.
Q275
Open questionThe range of frequency generated by VHF oscillator is-
Select an option to see the answer and solution.
Q276
Open questionAn npn BJT has gm = 38 mA/V, Cµ = 10-14 F, Cπ = 4 × 10-13 F, and DC current gain β0 = 90. For this transistor fT and fβ are
Select an option to see the answer and solution.
Q277
Open questionIn the figure, assume that the forward voltage drops of the PN diode D1 and Schottky diode D2 are 0.7 V and 0.3 V, respectively. If ON denotes conducting state of the diode and OFF denotes non-conducting state of the diode, then in the circuit,
Select an option to see the answer and solution.
Q278
Open questionThe large signal bandwidth of an op-amp is limited by
Select an option to see the answer and solution.
Q279
Open questionIn a transistor circuit IB remains constant but β increases
Select an option to see the answer and solution.
Q280
Open questionBiasing is used in transistor amplifiers to
1. Stabilize the operating point against temperature variations.
2. Place the operating point in the linear region of the characteristics.
3. Make α, β and ICO of the transistor independent of temperature variations.
4. Reduce distortion and increases dynamic range.
1. Stabilize the operating point against temperature variations.
2. Place the operating point in the linear region of the characteristics.
3. Make α, β and ICO of the transistor independent of temperature variations.
4. Reduce distortion and increases dynamic range.
Select an option to see the answer and solution.