### Transformers Objectives Part 01

**01 . ** Laminating the core of the transformer is minimized by the **Eddy current loss**

**02 . ** The function of breather in a transformer is **to arrest flow of moisture when outside air enter the** transformer

**03 . **Iron loss in a transformer occurs** in Core**

**04 . ** Under no load condition **Copper loss **is negligible

**05 . ** Open circuit test of a transformer gives** sum of hysteresis and eddy current loss.**

**06 . ** Copper loss in a transformer occurs in **Winding.**

**07 .** ** Back to back test **of a transformer provides information about regulation, efficiency and heading under load condition

**08 .** For a transformer the condition for maximum efficiency is when **Copper loss is equal to the iron loss**

**09 . ** Eddy current losses in a transformer core can be reduced by **reducing the thickness of laminations.**

**10 . ** In a transformer the magnetic coupling between the primary and secondary circuit can be increased by** using the magnetic core of low reluctance.**

**11 . ** If flux density in the core of a transformer then the **size of the transformer can be reduced**

**12 . ** **Copper loss** in a transformer varies significantly with load

**13 .** Voltage remain constant if the frequency is increased** eddy current loss will remain unchanged.**

**14 . ** The power factor in a transformer **depend on the power factor of the load.**

**15 . ** At no load the current taken by the **transformer lag behind the applies voltage by 80**

**16 . ** The efficiency of a transformer does not depends on** power factor**

**17 . ** If the secondary of a 1:10 step up transformer is connected to the primary of a 1:5 step up transformer then the total transformer ratio will be** 50**

**18 . ** **10 KVA , 100 Hz** transformer will be smallest in size.

**19 . ** A short circuit test on a transformer gives **copper losses at full load.**

**20 .** Leakage flux in a transformer may be minimized by **sectionalizing and interleaving the primary and secondary windings.**