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Question: In a series ac circuit a voltage of 20 V at 25 Hz causes a current of 0.20 A, while the same voltage at 75 Hz causes a current of 0.12 A. The circuit consists of [A]. R and C in parallel [B]. R and C in series [C]. R and L in series…
Question: A push pull amplifier is a [A]. power amplifier [B]. voltage amplifier [C]. current amplifier [D]. both power and current amplifier Answer: Option A Explanation: No answer description available for this question.
Question: Consider the following statements, regarding an OP AMP: [A]. 1 only [B]. 2 and 3 only [C]. 2 and 4 only [D]. 1, 2, 3 and 4 Answer: Option D Explanation: No answer description available for this question.
Question: In a series L-C circuit fed by ac voltage, voltage drops across L and C are 40 V and 30 V respectively. The supply voltage is [A]. 70 V [B]. 10 V [C]. 50 V [D]. 1.333 V Answer: Option C Explanation: |V| = IXL – IXC.
Question: For class B operation the theoretical maximum efficiency is [A]. 100% [B]. 78.5% [C]. 50% [D]. 27.5% Answer: Option B Explanation: No answer description available for this question.
Question: In class C operation of an amplifier circuit, the collector current exists for [A]. 360° of input wave [B]. 180° of input wave [C]. more than 180° of input wave [D]. less than 180° of input wave Answer: Option D Explanation: In class C operation output is in the form of short duration pulses.
Question: In a gate output is Low if and only if all inputs are High. The gate is [A]. OR [B]. AND [C]. NOR [D]. NAND Answer: Option D Explanation: No answer description available for this question.
Question: A current 10 sin (200t) A flows through a 5 mH inductance. The expression for voltage is [A]. 10 sin (200t + 90°) [B]. 10 sin (200t – 90°) [C]. 10 sin(1000t + 90°) [D]. 10 sin (1000t – 90°) Answer: Option D Explanation: Z = jXL = jωL = = 1∠90° and V…
Question: For the given truth table, the correct Boolean expression is [A]. XYZ + X YZ + X Y Z [B]. X Y Z + XYZ + X YZ [C]. X Y Z + XYZ + XY Z [D]. XYZ + XYZ + XY Z Answer: Option B Explanation: No answer description available for this…
Question: In the analysis of common emitter amplifier we may neglect [A]. hre [B]. hoe [C]. hfe [D]. hie Answer: Option A Explanation: No answer description available for this question.