In OC test it gives no load loss only. it is due to (score 1)

As the load varies in the transformer (score 1)

In short circuit test the meters are connected in HV side due to.(score 1)

If the full load copper loss is 200W then the half load copper loss is (score 1)

If the full load core loss and copper loss of a transformer are 50 w and 100 w. it has a full load efficiency of 95%.find efficiency at half load. (score 3)

Find the angle at which a transformer gives zero regulation if it has an equivalent resistance of 10 ohm and reactance of 3 ohm. (score 2)

At what percentage of the load transformer gives maximum efficiency if it has full load core and copper loss of 125 W and 80 W respectively. (score 2)

Find efficiency of a 15KVA transformer at full load on 0.8 pf lag. if it has following readings

Wattmeter reading on oc test is 40W

Watt meter reading on sc test is 140w (score 3)

Normally the current transformers are connected in (score 1)

Turns ratio of potential transformer is always(N₂/N₁) (score 1)

The secondary of current transformer is always in (score 1)

Current transformer is a (score 1)

The saving of copper in a step down auto transformer is _____ times of two winding transformer of same rating. (score 1)

Emf induced in auto transformer by the principle of (score 1)

In the distribution end which type of three phase transformer connection is used (score 1)

Normally the teritiary winding in (score 1)

In T connection the secondary voltages in main and teaser transformer has a phase shift of (score 1)

in open delta connection if phase current is 9A then line current is       (score 1)