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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Q. A transistor has a maximum power dissipation of 350 mW at an ambient temperature of 25°C. If derating factor is 2 mW/°C, the maximum power dissipation for 40°C ambient temperature is

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Q. The output voltage waveform of a CE amplifier is fed to a dc coupled CRO. The trace on the screen will be

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Q. In an RC phase shift oscillator, the total phase shift of the three RC lead networks is

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Q. It has been found that in a rectifier circuit with RC filter one RC section reduces ripple by 15%. Two RC sections are used in cascade the reduction in ripple would be

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Q. An op-amp has

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Q. As the ratio Rf/RL increases the efficiency of a rectifier increases.

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Q. If the Q of a single stage single tuned amplifier is doubled, the bandwidth will

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Q. In full wave rectification, if the input frequency is 50 Hz, then frequency at the output of filter is

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Q. The turn ratio of a transformer is 20:1, if a load of 10Ω is connected across the secondary, what will be the effective resistance seen looking into the Primary?

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Q. In a CE amplifier circuit the ac voltage between emitter and ground

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Q. A CE amplifier has re = 6 Ω, β = 100 and a = 0.98. The input impedance is

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