⚡Electrical Engineering MCQs
Electrical Engineering MCQs
499 MCQs271
A transformer coupled class A power amplifier has a load of 100 O on the secondary. If the turn ratio is 10:1, what is the value of load appearing on the primary?
A5 kO
B20 kO
C100 kO
D10 kO
272
Transformer coupling can be used in______________amplifiers?
AEither power or voltage
BOnly power
COnly voltage
DNone of the above
273
An AF amplifier is shielded to ________________?
AKeep the amplifier cool
BProtect from rusting
CPrevent induction due to stray magnetic fields
DNone of the above
274
The disadvantage of impedance matching is that it _______________?
AGives distorted output
BGives low power output
CRequires a transformer
DNone of the above
275
The most costly coupling is _______________ coupling?
ARC
BDirect
CImpedance
DTransformer
276
When an a.c. signal is applied to an amplifier, ,the operating point moves along_________________?
Ac. load lines
Bc. load line
Cboth
Dnone of the above
277
A single stage transistor amplifier contains______________ and associated circuitry?
ATwo transistors
BOne transistor
CThree transistor
DNone of the above
278
It is generally desired that a transistor should have_____________________ input impedance?
ALow
BVery low
CHigh
DVery high
279
In the zero signal conditions, a transistor sees _____________ load?
Ac.
Bc.
Cboth
Dnone of the above
280
The point of intersection of d.c. and a.c. load lines is called________________?
ASaturation point
BCut off point
COperating point
DNone of the above