The dc load current in a bridge rectifier circuit is 10 mA. The dc load current through each diode is
Answer: D
Since both diodes contribute equal load current, each diode current is 5 mA.
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An oscillator requires an amplifier
Answer: B
Positive feedback is necessary for sustained oscillations.
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Calculate the conductivity of pure silicon at room temperature when the concentration of carriers is 1.6 x 1010 per cm3. Take μe = 1500 cm2/V-sec, μh = 500 cm2/V-sec at room temperature,
Answer: A
σi = (μe + μn) . e . ni .
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A full wave rectifier using centre tapped transformer and a bridge rectifier use similar diodes and have equal no load output voltage. Under equal load conditions
Answer: A
Since two diodes are in series bridge rectifier, voltage drop is more.
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In a CE amplifier the ac cut off voltage is 9 V and slope of ac load line is - 0.5 mA/V. The ac saturation current is
Answer: B
AC saturation current is cutoff voltage x slope of ac load line.
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A full wave bridge diode rectifier uses diodes having forward resistance of 50 ohms each. The load resistance is also 50 ohms. The voltage regulations is
Answer: D
No Explanation.
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An integrating amplifier has resistance in feedback path.
Answer: B
It has capacitance in feedback path.
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The most commonly used bias in BJT amplifier circuits is
Answer: A
Voltage divider bias stabilizes IC.
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Assertion (A): For large signal variations an amplifier circuit has to be analysed graphically
Reason (R): The output characteristics of a transistor is nonlinear.
Answer: A
Since the characteristics is non-linear, graphical analysis is needed.
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In a push pull circuit
Answer: A
Since each transistor conducts for 180°. Therefore high efficiency but low distortion.
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