1. A transformers connected to the output of a generator and used to their voltage up to transmission level is called ?

 

Unit Transformer

Sub-station Transformer

Distribution Transformer

Potential Transformer

 

2.    The basis of transformer operation can be derived from :

 

Newton's law

Faraday's law

Coulomb's law

Ohm's law

 

 

3.   The fundamental components in the magnetization currents lags the voltage applied to the core by :

 

 

0 degree Page No-73

45 degree Page No-73

75 degree Page No-73

90 degree Page No-73

 

 

 

4.   Eddy current losses are preoperational to the :

 

Voltage applied to the transformer

Square of the voltage applied to the transformer

Current in the winding

Square of the current in the winding

 

 

 

5.   In the short-circuit test :

 

Primary terminal is connected to full rated line voltage

Primary terminal is connected to fairly low voltage source

Primary terminal is open circuited

Secondary terminal is open circuited