Q. The main use of JFET with a

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Q. Assertion (A): A dc stabilizer has constant output voltage irrespective of variations in input voltage and load current

Reason (R): A dc series regulator uses a zener diode across the load to stabilize the output voltage.

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Q. In the self biasing scheme (RF across collector to base) of BJT, S1 tends to unity by __________ RC is the collector load Resistance.

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Q. In op-amp integrating amplifier the input is feed to

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Q. Transformer coupling in transistor amplifier circuits provides high efficiency, because

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Q. Two identical FETs each having parameters gm and rd are connected is parallel. The composite FET has parameters

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Q. If f is more than funity the gain of op-amp becomes less than 1.

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Q. In a N-P-N transistor the function of the emitter is

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Q. The properties of FETs resemble closely to

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Q. The source of the harmonic distortion in a RC coupled transistor amplifier is usually

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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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