The brush contact losses in a d.c. Machine is – McqOptions

MCQOPTIONS

1.	The brush contact losses in a d.c. Machine is
A.	Inversely proportional to the square of current
B.	Directly proportional to the square of current
C.	Inversely proportional to the current
D.	Directly proportional to the current
Answer» E.

Discussion

No Comment Found

Related MCQs

<p> In double delta transformation, a double delta refers to the case where there are two delta transformations in</p>
<p> The value of load angle δ and the internal machine angle ∅ for maximum power developed in synchronous motor is equal to</p>
<p> What happens if a stationary alternator is connected to live bus bar?</p>
<p> If a d.c. series motor is started on very light load or on no load then</p>
<p> If the flux is increased by 50% and speed is reduced by 50% of a d.c. motor (keeping the other parameters constant), then its back emf will become</p>
<p> In a single phase, full wave bridge circuit and in three phase, delta full wave bridge circuit, the ripple voltage frequency is always</p>
<p> During the one complete revolution of the conductor in a 4 pole synchronous generator, induced emf will experience</p>
<p> Which method is suitable for the speed control, below and above the normal rated speed of d.c. shunt motor?</p>
<p> When the induction motor runs faster than the synchronous speed, the induction motor runs as</p>
<p> The performance of induction motor is effected by the harmonics in the</p>