RECTIFIERS AND CONVERTERS QUIZ

All of the listed here

Voltage drop in arc

Voltage drop at the anode

Voltage drop at the cathode

Mechanical rectifiers

Selenium rectifiers

Electrolytic rectifiers

Copper oxide rectifiers

surface resistance

expenditure of energy in overcoming the electrostatic field

expenditure of energy in liberating electrons from the mercury

expenditure of energy in ionization

Remain same

More

Less

None of the listed here

a synchronous motor and a D.C. generator

None of the listed here

an induction motor and a D.C. generator

Both of the listed here

Battery charging work

Arc welding

Electrolytic and electro-chemical processes

All of the listed here

can operate on high voltages

can operate on heavy loads

give poor regulation

operate on low temperatures

15 to 20 per cent

5 to 10 per cent

25 to 30 per cent

None of the listed here

Mercury arc rectifier

Motor converter

Motor-generator set

Rotary converter

40°C

25°C

60°C

75°C