Q. Two transistors have same value of a but different gain (G) bandwidth (B) product. The transistors have similar geometry. However one of them is germanium and the other is silicon. The transistor with lower GB product

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Q. Which distortion is least objectionable in case of audio amplifiers?

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Q. In a single stage differential amplifier, the output offset voltage is mainly dependent on the mismatch of

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Q. In a combination limiter with sinusoidal input voltage the output wave can be nearly square.

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Q. Assertion (A): A Darlington amplifier has very low output impedance

Reason (R): The circuit has a low resistance RE between emitter and ground

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Q. A Hartley oscillator uses

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Q. A silicon PN junction diode under reverse bias has depletion region of width 10 μm. The relative permittivity of silicon, Ɛr = 11.7 and the permittivity of free space Ɛ₀ = 8.85 x 10¯¹² F/m. The depletion capacitance of the diode per square meter is

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Q. A delay equalizer is a

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Q. A cascade amplifier stage is equivalent to

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Q. Which one of the following devices is not used as the controller in a stabilizer?

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Q. The disadvantage of transformer coupling in amplifier is

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Q. A transistor is said to be in a quiescent state when

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Q. According to Barkhausen criteria in order to sustain the oscillations

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Q. A Wien bridge oscillator uses

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Q. In the above case, what will be the value of capacitor to obtain 100 kHz frequency?

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Q. Equal amplitude ac signals are given as inputs to both inverting and given as inputs to both inverting and non-inverting terminals of an op-amp. The output will be zero when the phase difference between inputs is

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Q. Which of the following can be used to isolate a low impedance from a high impedance source?

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Q. A class C amplifier uses

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Q. A three-section RC phase shift oscillator has R = 10K ohms and C = 0.001 μF. If the oscillator is to be made variable using the same value of R, what should be the value of capacitor to obtain a frequency if 1 kHz?

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Q. The input to negative clamper has a peak value of Vp. Then in the output the positive and negative peaks are nearly

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