Q1:- The basic function of a transformer is to change
Q2:-In an ordinary transformer which of the following does not change
- the level of the voltage
- the power level
- the power factor
- the fequency
Q2:-In an ordinary transformer which of the following does not change
- voltage
- current
- frequency
- all
Q3:- The efficiency of a power transformer is around
- 50%
- 60%
- 80%
- 90%
Q4:-In a transformer electrical power is transferred from, primary to secondary
- through air
- by magnetic flux
- through insulating medium
- none
Q5:- The two windings of a transformer are
- conductively linked
- inductivey linked
- not linked at all
- electrically linked
Q6:- The flux created by the current flowing through the primary winding induced emf in
- constant magnetic flux
- increasing magnetic flux
- alternating magnetic flux
- alternating electrical flux
Q7:- The flux created by the current flowing through the primary
winding induces emf in
- primary winding only
- secondary winding only
- transformer core only
- both 1 and 2
Q8:- The primary and secondary windings of a power transformer always have
- a common magnetic circuit
- separate magnetic circuits
- wire of same size
- same number of turns
Q9:-The iron core in a transformer provides a path to the main flux
- low reluctance
- high reluctance
- low resistance
- high conductivity
Q10:- If the rated dc voltage is applied instead of a ac to the primary of a transformer
- secondary of transformer will burn
- primary of transformer will burn
- secondary voltage will be excessively high
- there will be no secondary voltage
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