Amplifiers » Exercise - 145. If the voltage gain of an amplifier without feedback is 20 and with negative voltage feedback it is 12, then feedback fraction is ........ (a) 5/3 (b) 3/5 (c) 1/5 (d) 0.033
Amplifiers » Exercise - 120. The value of negative feedback fraction is always .......... (a) less than 1 (b) more than 1 (c) equal to 1 (d) none of the above
Amplifiers » Exercise - 147. An amplifier has an open loop voltage gain of 1,00,000. With negative voltage feedback, the voltage gain is reduced to 100. What is the sacrifice factor ? (a) 1000 (b) 100 (c) 5000 (d) none of the above
Tags: voltage, amplifiers, gain, exercise, amplifier, negative, feedback, electronics, engineering
Amplifiers » Exercise - 119. When negative voltage feedback is applied to an amplifier, its voltage gain ............ (a) is increased (b) is reduced (c) remains the same (d) none of the above
Tags: amplifiers, voltage, exercise, negative, feedback, amplifier, gain, electronics, engineering
Amplifiers » Exercise - 17. Negative feedback in an amplifier : (a) reduces the voltage gain (b) increases the voltage gain (c) does not affect the voltage gain (d) converts the amplifier into an oscillator
Tags: voltage, gain, amplifiers, amplifier, exercise, negative, feedback, electronics, engineering