1000+ Converters and Rectifiers Objective Questions and Answers - 1

Question: 1

In a mercury arc rectifier, the anode is usually made of

(A) graphite

(B) silver

(C) aluminium

(D) copper

Question: 2

The applications of seledium rectifiers are usually limited to potential of

(A) 10 V

(B) 30 V

(C) 100 V

(D) 200 V

Question: 3

Copper oxide rectifier is usually designed not to operate above

(A) 45°C

(B) 30°C

(C) 20°C

(D) 10°C

Question: 4

The voltage drop at anode, in a mercury arc rectifier is due to

(A) high temperature inside the rectifier

(B) energy spent in overcoming the electrostatic field

(C) high ionization potential

(D) self restoring property of mercury

Question: 5

In a mercury arc rectifier characteristic blue luminosity is due to

(A) electron streams

(B) high temperature

(C) colour of mercury

(D) ionization