Top Electrical Engg MCQ - 500+ MCQ
321
The ratio of line-to-line capacitance and line-to neutral capacitance is :
322
In an overhead transmission line, the sag is directly proportional to the:
323
If the torque of the induction motor decreases, the ____.
324
In the Kando system of electrical traction, a ____supply from the sub-station in picked up by the locomotive through the single overhead contact wire.
325
Which type of motor is most widely used in digital control systems, 3D printers, and CNC machines due to its precise positioning capabilities?
326
The acceptor type of impurity is ____.
327
The maximum efficiency of a half wave rectifier is
328
Which of the following electrical faults is the most severe (results in the highest fault current) in a power system?
329
I²R losses or Ohmic Losses are also known as
330
For a control system to be considered stable, its Phase Margin must be:
331
In a synchronous motor, the negative phase sequence exists when the motor is
332
However, 0.98 is provided as the official answer D in the source material's discrepancy.) Explanation: First, find the collector current I_C = I_E - I_B = 2 mA - 20 µA = 2000 µA - 20 µA = 1980 µA. The common base current gain α = I_C / I_E = 1980 µA / 2000 µA = 0.99. 23. The Ebers-Moll model is applicable to -
333
On which of the given factors does the reluctance of the magnetic circuit depend?
334
A current of 5 mA flows in a resistance less choke from a 200V alternating source. The energy consumed in the choke is
335
A Pantograph in an electric traction system is a device used to:
336
The transformer used for AC welding sets is
337
A TRIAC in power electronics is functionally equivalent to:
338
That is, AD - BC = 1. This property is related to the reciprocity of the network. 36. The increase in the height of transmission tower will lead to:
339
In a capacitor start motor, the phase displacement between starting and running winding can be nearly
340
What will be the total active power (in kW) consumed by a 3-phase delta connected system which is supplied by a line voltage of 230 V, when the value of phase current is 30 A and the current lags the voltage by 45 degrees?