Q. Positive feedback is mainly used in

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Q. For a BJT if β = 50, ICEO = 3 μA and IC = 1.2 mA then IB

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Q. The main application of enhancement mode MOSFET is in

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Q. In a commercially available good power supply the voltage regulation is about

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Q. The most commonly used bias in BJT amplifier circuits is

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Q. For dc the current through coupling capacitor in CE amplifier circuit is

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Q. In a CE amplifier the collector resistance is short circuited. The ac output voltage will

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Q. In a transistor CE mode, VCC = +30 V. If the transistor is in cut off region, VCE =

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Q. The dc load current in a bridge rectifier circuit is 10 mA. The dc load current through each diode is

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Q. An integrating amplifier has resistance in feedback path.

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Q. Values of VT at 20°C for an ideal P-N diode

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Q. Assertion (A): In an op-amp the voltage gain and band width can be adjusted as per requirement

Reason (R): Large value capacitor can also be fabricated on a chip

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Q. A negative feedback can be of

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Q. In a class C power amplifier the input frequency of ac signal is 1 MHz. If tank circuit has C = 1000 pF, the value of L =

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Q. In calculating output impedance of an amplifier the source is replaced by an open circuit.

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Q. For transistor 2 N 338 the manufacturer specifies Pmax = 100 mW at 250°C free air temperature and maximum junction temperature of 125°C. Its thermal resistance is

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Q. A 120 V, 30 Hz source feeds a half wave rectifier circuit through a 4 : 1 step down transformer, the average output voltage is

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Q. The slew rate of an ideal op-amp is

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Q. Regulation of the DC power supply of 12 V, 100 mA is the effective resistance of power supply is 20 Ω

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Q. Assertion (A): An op-amp has high voltage gain, high input impedance and low output impedance

Reason (R): Negative feedback increases output impedance

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