A. ions
B. electrons
C. ions and electrons
D. any of the above
Correct Answer: ions ✔
Last Updated: December 17, 2018
Related MCQs
- A mercury arc rectifier possesses __________ regulation characteristics
- In a grid control of mercury arc rectifiers when the grid is made positive relative to cathode, then it the electrons on their may to anode.
- On which of the following factors the number of phases for which a rectifier should be designed depend ?
- It is the_________of the transformer on which the magnitude of angle of overlap depends?
- In a phase-shift control method, the phase shift between anode and grid voltages can be achieved by means of__________?
- 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__________?
- Which of the following statement is incorrect ?
- In phase-shift control method the control is carried out by varying the of grid voltage
- The metal rectifiers are preferred to valve rectifiers due to which of the following advantages ?
- Copper oxide rectifier is usually designed not to operate above__________?
- Ageing of a selenium rectifier may change the output voltage by__________?
- The efficiency of the copper oxide rectifier seldom exceeds__________?
- Selenium rectifier can be operated at temperatures as high as__________?
- The applications of selenium rectifiers are usually limited to potential of__________?
- In selenium rectifiers efficiencies ranging from ___ to _______ percent are attainable?
- A commutating rectifier consists of commutator driven by__________?
- In a mercury arc rectifier, the anode is usually made of__________?
- Which of the following rectifiers have been used extensively in supplying direct current for electroplating ?
- Which of the following is the loss within the mercury arc rectifier chamber ?
- Which of the following rectifiers are primarily used for charging of low voltage batteries from AC supply ?
- The efficiency of an electrolytic rectifier is nearly__________?
- The ignited or auxiliary anode in mercury arc rectifier is made of__________?