Transformer MCQ online test Quiz

Transformer MCQ online test | transformer multiple choice questions mock test

In this article we will transformer MCQ Quiz online test by which you can track your exam performance at home and learn with fact transformer MCQ online test improve your exam performance at home 

MCQ Quiz

1. The basic function of a transformer is to change?

Ans: [ The level of voltage ] Exp-:in a transformer the energy transferred usually takes place with a change of flux supply frequency of output remain the same as that of the input power factor and power level are almost the same on both sides of the transformer

2. The efficiency of a power transformer around?

Ans: [ 95% ] Exp-:transformer is a static machine owing to absence of rotating parts there are no friction or winding losses further The other losses are also relatively low so that the efficiency of a transformer is high

3. in a transformer electrical power is transferred from primary to secondary?

Ans:[ buy magnetic flux ]

4. The two windings of a transformer are?

Ans: [ inductively linked ] Exp-:transformer transfer electrical energy from one electrical circuit to another by the principle of electromagnetic induction

5. Transformer action requires a

Ans: [ alternating magnetic flux ] Exp-: the action of a transformer is based on the principle that energy may be efficiently transferred by induction from one set of coil to another by means of a varying magnetic flux provide that both side set of a coil are on a common magnetic circuit in a transformer the coil and magnetic circuit are all stationary with respect to one another

6. The flux created by the current flowing through the primary winding?

Ans: [ both primary and secondary windings ] Exp-: when the primary winding is connected to an AC supply means a current flows through it since this winding links with an ironcore current flowing through this winding produce an alternating flux in the core since the flux is alternating and links with the secondary winding also induce an EMF in the secondary winding the frequency of induced EMF in secondary winding is the same

7. the primary and secondary winding of a transformer always have?

Ans:[ a common magnetic circuit ]

8. The iron core in a transformer provide a____ path to main plux?

Ans: [ low reluctance ] Exp-: the transformer is built up of soft iron or silicon steel lamination and therefore provides low reluctance path to main flux

9.if rated dc voltage is applied in state of ac to primary of transformer?

Ans: [ primary of transformers burn ] Exp-: If a rated de voltage is applied to the primary of the transformer, the flux produced in the transformer core will not vary but remain constant in magnitude and therefore, there will be no self-induced emf in the primary winding (which is only possible with varying flux linkage) to oppose the applied voltage and since the resistance of the primary winding is quite low, a heavy current will flow through the primary winding that may cause burning out of the primary winding.

10. A transformer transforms?

Ans: [ voltage and current ] Exp-: There is no change in frequency in an ordinary transformer. In a transformer, the energy transfer (voltage and current) usually takes place with a changes in voltage and current.