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Q. What is an amplifier? What are the various types of amplifiers?
AMPLIFIER: A circuit that increases the amplitude of the given input signal is an amplifier. A small a.c. signal fed to the amplifier is obtained as a larger a.c. signal of the same frequency at the output. They constitute the essential parts of many communication circuits such as television and radio.
Consider the 220-V, 1800-r/min dc motor, controlled by a three-phase fully controlled rectifier from a 60-Hz ac source. The armature-circuit resistance and inductance are 1.5 and
Q. Evaluate complex power in power system? The complex power ¯S in a single-phase systemis the complex sum of the real (P) and reactive (Q) power, expressed as follows:
Q. Explain about Amplifier noise? Amplifier noise arises from both thermal sources (resistances) and nonthermal sources (semiconductor devices). Although nonthermal noise is no
Q. Sampling of digital communication systems? Sampling of an analog signal makes it discrete in time. A bandlimited signal can be recovered exactly from its samples, taken peri
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Q. Show Advantage of digital control system over analog system? Sampled data and digital control offer several advantages over analog systems: • More compact and lightweight
Explain the effect of impurity on the conductivity of a semiconductor. To form a semi-conductor conductive, a small amount of appropriate impurity is added. This is then termed
Q. Consider an amplifier as a voltage source with an internal resistance of 72 . Find the turns ratio of the ideal transformer such that maximum power is delivered when the amplif
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Why we provide the short circuit and open circuit test in transformer
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