NLC Technical Quiz 33

List I (transformer) List II (voltage ratio)

Match both lists and select the correct answer.

List I

a. Power transformer

b. Auto transformer

c. Welding transformer

d. Isolating transformer

List II

1) 230 V/230 V

2) 220V/240 V

3) 400V/100 V

4) 132 kV/ 11 kV

The Maxwell’s equation  is based on

A step-up chopper has  as the source voltage and  as the duty cycle. The output voltage for this chopper is given by:

the period of the composite signal x[n].

The magnetic field density is expressed as:

The value of K will be:

Which of the following memories can store usual information.

What will be the maximum efficiency of a 120 kVA transformer which is having iron loss of 1600 W & copper loss 2500 W.

For a permanent split capacitor motor, which one of the following statement is not true?