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.Management Sciences
Category: Electrical Engineering Mcqs
An oscillator differs from an amplifier because it_____________?
A. Has more gain
B. Requires no input signal
C. Requires no d.c. supply
D. Always has the same input
Level of electrolyte in a cell should be ________ the level of plates
A. below
B. equal to
C. above
D. none of the above
In a capacitor start single-phase motor, when capacitor is replaced by a resistance____________?
A. torque will increase
B. the motor will consume less power
C. motor will run in reverse direction
D. motor will continue to run in same direction
If RC and RL represent the collector resistance and load resistance respectively in a single stage transistor amplifier, then a.c. load is____________________?
A. RL + RC
B. RC || RL
C. RL – RC
D. RC
The presence of ozone due to corona is harmful because it________________?
A. reduces power factor
B. corrodes the material
C. gives odour
D. transfer energy to the ground
E. none of the above
The output transformer used in a power amplifier is a _____________ transformer?
A. 1:1 ratio
B. Step-up
C. Step-down
D. None of the above
Which of the following does not change in an ordinary transformer ?
A. Frequency
B. Voltage
C. Current
D. Any of the above
Out of the following capacitors of identical rating which one will have the smallest dimensions ___________ ?
A. Aluminium foil capacitor
B. Mica capacitor
C. Ceramic capacitor
D. Paper capacitor
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