A. produces excessive gassing
B. loosens the active material
C. increases the temperature resulting in buckling of plates
D. all above
Electrical Engineering Mcqs
The advantage of using free – wheeling diode in half controlled bridge converter is that
A. There is always a path for the dc current independent of the ac line
B. There is always a path for the ac current independent of the ac line
C. There is always a path for the dc current dependent of the ac line
D. There is always a path for the ac current independent of the ac line
In commutation PAC stands for_______?
A. Permanent angle converter
B. Phase angle converter
C. Phase angle commutation
D. Phase and commutation
You have to replace 1500 Q resistor in radio. You have no 1500 Q resistor but have several 1000 Q ones which you would connect__________?
A. two in parallel
B. two in parallel and one in series
C. three in parallel
D. three in series
In a mercury pool rectifier, the voltage drop across its electrodes___________?
A. is directly proportional to load
B. is inversely proportional to load
C. varies exponentially with the load current
D. is almost independent of load current
If ADM = 3500 and ACM = 0.35, the CMRR is _______________?
A. 1225
B. 10,000
C. 80 dB
D. answers (A) and (B)
For similar carrier and modulating signals, the line current used in CSI is_____________?
A. Identical to line voltage in a VSI
B. Identical to line current in VSI
C. Identical to phase voltage in VSI
D. Identical to phase voltage in CSI
A 200 turn coil has an inductance of 12 mH. If the number of turns is increased to 400 turns, all other quantities (area, length etc.) remaining the same, the inductance will be___________?
A. 6 mH
B. 14 mH
C. 24 mH
D. 48 mH
The most inexpensive switch is _____________ switch?
A. Electronic
B. Mechanical
C. Electromechanical
D. None of the above
A power semiconductor may undergo damage due to____________?
A. High di/dt
B. High dv/dt
C. Low di/dt
D. Low dv/dt
