List of top Physics Questions on Amplifiers

In a transistor amplifier, the voltage gain is
The load resistance and the base-emitter voltage of a transistor in CE configuration are 5 kΩ and 0.02 V respectively. If the collector current is 2 mA, then its voltage gain is
Operational amplifiers can be used as
A. Summing circuit
B. Voltage regulator
C. Integrator
D. Differentiator
E. Clipping Circuit
Choose the correct answer from the options given below.
Charge amplifier is used to amphfy the output signal of
(A) Piezoelectric Transducer
(B) Photo emissive Transducer
(C) Photo conductive Transducer
(D) Photo Voltaic Transducer
(E) LVDT
Choose the correct answer from the options given below:
In a CE transistor amplifier, the signal voltage across the collector resistance is 2.5 V. The input signal voltage is 0.02 V. If the base and collector resistances are 1.5 k\(\Omega\) and 2.5 k\(\Omega\), find the current amplification factor.
In an amplifier with negative feedback, the bandwidth is
If the feedback fraction of an amplifier is 0.01, then voltage gain with negative feedback is approximately ____
In a common emitter (CE) amplifier having a voltage gain G, the transistor used has transconductance 0.03 mho and current gain 25. If the above transistor is replaced with another one with transconductance 0.02 mho and current gain 20, the voltage gain will be