Related Questions

When no signal is applied, the approximate collector efficiency of class A power amplifier is
A 10%
B 0%
C 25%
D 50%
One of the advantages of base modulation over collector modulation of a transistor class C amplifier is
A Improved efficiency
B Better linearity
C High power output per transistor
D The lower modulating power requirement
A class A power amplifier is sometimes called ___________ amplifier
A Symmetrical
B Single-ended
C Reciprocating
D Differential
কমন গ্রামিটার বর্তনীতে একটি n-p-n ট্রানজিস্টরের সংগ্রাহকে 8 V ব্যাটারী সংযুক্ত আছে। সংগ্রাহক Rt রোধের দুই প্রান্তে বিভব পতন 0.5 V হলে বেস কারেন্ট নির্ণয় কর। [দেওয়া আছে Rt = 800 Ω এবং বর্তনীর α =0.96)(An n-p-n transistor is connected in common emitter configuration in which the collector supply is 8 V. Determine the base current, if the voltage drops across the resistance Re of the collector circuit is 0.5 V. [Rt = 800Ω and α = 0.96])
A 0.625 mA
B 0.000625 mA
C 0.974 mA
D 0.026 mA
E 0.000026 mA
The maximum collector efficiency of class B operation is ___________
A 50%
B 90%
C 5%
D 5%
The maximum efficiency of resistance loaded class A power amplifier is
A 5%
B 50%
C 30%
D 25%
The maximum efficiency of transformer coupled class A power amplifier is ___________
A 30%
B 50%
C 80%
D 45%
A single stage transistor amplifier with collector load RC and emitter resistance RE has a d.c. load of ___________
A RC
B RC || RE
C RC - RE
D RC + RE
A single phase transformer has a maximum efficiency of 90% at full load and unity power factor. Efficiency at half load at the same power factor is -
A 87.8%
B 86.7%
C 88.26%
D 88.9%
The ratio of boys to girls in class A is 3 to 4 . The ratio of boys to girls in class B is 4 to 5 . If the two classes were combined, the ratio of boys to girls in class B is two less than the number of girls in class A. How many girls are in class A?
A 87
B 11
C 12
D 15

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