A. Small
B. Very small
C. Large
D. None of the above
Related Mcqs:
- ________________ coupling is generally employed in power amplifiers?
A. Transformer
B. RC
C. direct
D. Impedance - Power amplifiers generally use transformer coupling because transformer permits______________?
A. Cooling of the circuit
B. Impedance matching
C. Distortionless output
D. Good frequency response - A series resonant band-stop filter consists of a 68 Ω resistor, a 110 mH coil, and a 0.02 µF capacitor. The internal resistance, RW, of the coil is 4 Ω. Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is the output voltage magnitude at f0?
A. 1.1 mV
B. 11.1 mV
C. 111 mV
D. 200 mV - A series resonant band-pass filter consists of a 2 mH coil, a 0.005 µF capacitor, and a 120 Ω resistor. The winding resistance of the coil is 12 Ω. The output voltage is taken off the resistor. Input voltage is 12 Vrms. What is the output voltage magnitude at the center frequency (f0)?
A. 10.9 V
B. 1.09 V
C. 1.1 V
D. 12 V - Class C amplifiers are used as ___________________?
A. AF amplifiers
B. Detectors
A. amplifiers
C. None of the above - In transistor amplifiers, we generally use______________ capacitors?
A. Electrolytic
B. Mica
C. Paper
D. Air - In transistor amplifiers, we use_____________transformer for impedance matching?
A. Step up
B. Step down
C. Same turn ratio
None of the above - The output signal voltage and current of a power amplifier are 5V and 200 mA; the values being r.m.s. What is the power output ?
A. 1 W
B. 2 W
C. 4 W
D. None of the above - What will be the collector efficiency of a power amplifier having zero signal power dissipation of 5 watts and a.c. power output of 2 watts ?
A. 20%
B. 80%
C. 40%
D. 50% - The maximum a.c. power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transistor used ?
A. 10 W
B. 15 W
C. 5 W
D. 20 W
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