1. When the gain of an amplifier is 0 dB, the frequeney at which this occurs called: a) Zero gain frequency b) Unity gain frequeney e) Midrange frequency d) Critical frequeney 2. The Millar input capacitance in RC coupled amplifier depends on: a) The voltage gain at critical frequeney b) The input capacitance of the cireuit c) The capacitance between the basc and collector of the transistor d) The capacitance between the base and emitter of the transistor 3. If the gain of an amplifier is increased from 6 dB to 18 dB when the frequeney is inereased from 100 Hz to 10 KHz, then the roll off is: a) 18 dB/Decade b) 12 dB/ Octave c) 6 dB/ Decade d) 6 dB/ Octave
Power Amplifier
The power amplifier is an electronic amplifier designed to maximize the signal strength of a given input. The input signal strength is enhanced to a high enough level to drive output devices such as speakers, headphones, RF (Radio frequency) transmitters, etc. Unlike voltage / current amplifiers, the power amplifier is designed to drive core loads directly and is used as a storage block in the amplifier series.
Maximum Efficiency Criterion
In every field of engineering, there is a tremendous use of the machine and all those machines are equipped for their popular work efficiency so it very much important for operation engineers to monitor the efficiency of the machine, planning engineers to check out the efficiency of the machine before installing the machine and design engineers to design machine for higher efficiency than and then the utility will procure their products that will ultimately lead to profit and loss of the company. It indicates the importance of efficiency right from the initial stage as manufacturing units, intermediate stage as planning coordinators, and end-users stage as a utility.
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