MCQs on Transformer
1. The two windings of a transformer are
- Conductively linked
- inductively linked
- not linked
- electrically linked
2. The iron core of the transformer provides a _________ path to the main flux.
- low reluctance
- high reluctance
- low resistance
- high conductivity
3. A transformer transforms
- voltage
- current
- voltage and current
- frequency
4. The function of transformer is to change
- the level of voltage
- power level
- power factor
- frequency
5. Transformer actions require
- constant magnetic flux
- increasing magnetic flux
- alternating magnetic flux
- alternating electric flux
6. On the no-load phasor diagram of transformer, the core loss component of the current remains in phase with
- no-load current
- primary supply voltage
- primary induced voltage
- core flux
7. The power factor of a transformer on no load is poor due to
- magnetizing reactance of the transformer
- open-circuited secondary
- low primary winding resistance
- low no-load current
8. In a transformer_________ decreases with the increase in leakage flux.
- primary induced emf
- secondary induced emf
- secondary terminal voltage
- none of the above
9. The inductive reactance of a transformer depends on
- electromotive force
- magnetomotive force
- magnetic flux
- leakage flux
10. Open circuit test in a transformer is performed with
- rated transformer voltage
- rated transformer current
- direct current
- high-frequency supply