In a mercury arc rectifier______ flow from anode to cathode ions ions and electrons All of the listed here electrons TRUE ANSWER : ? YOUR ANSWER : ?
The internal efficiency of a mercury arc rectifier depends on voltage and current voltage only r.m.s. value of current current only TRUE ANSWER : ? YOUR ANSWER : ?
The voltage drop at anode, in a mercury arc rectifier is due to self restoring property of mercury energy spent in overcoming the electrostatic field high temperature inside the rectifier high ionization potential TRUE ANSWER : ? YOUR ANSWER : ?
The advantage of mercury arc rectifier is that All of the listed here it is light in weight and occupies small floor space it is comparatively noiseless it has high efficiency TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following are the applications of D.C. system? Electrolytic and electro-chemical processes Arc welding All of the listed here Battery charging work TRUE ANSWER : ? YOUR ANSWER : ?
The efficiency of an electrolytic rectifier is nearly 60 % 50 % 70 % 40 % TRUE ANSWER : ? YOUR ANSWER : ?
The cathdde voltage drop, in a mercury arc rectifier, is due to surface resistance expenditure of energy in ionization expenditure of energy in overcoming the electrostatic field expenditure of energy in liberating electrons from the mercury TRUE ANSWER : ? YOUR ANSWER : ?
The metal rectifiers are preferred to valve rectifiers due to which of the following advantages ? They are mechanically strong None of the listed here Both of the listed here They do not require any voltage for filament heating TRUE ANSWER : ? YOUR ANSWER : ?
In a single phase rotary converter the number of slip rings will be Three Two Six Four TRUE ANSWER : ? YOUR ANSWER : ?
In mercury arc rectifiers having grid, the arc can be struck between anode and cathode only when the grid attains a certain potential, this potential being known as non of the listed here critical grid voltage all of the listed here maximum grid voltage TRUE ANSWER : ? YOUR ANSWER : ?