A transformer having efficiency of 90% is working on 200V and 3kW power supply. If the current in the secondary coil is 6A, the voltage across the secondary coil and the current in the primary coil respectively are:
300V, 15A
450V, 15A
450V, 13.5A
600V, 15A
Efficiency of transformer -
%
-
power supply=3KW
at 90% efficiency power in secondary coil is = 2.7KW
Current in primary coil
Option 1)
300V, 15A
This is incorrect option
Option 2)
450V, 15A
This is correct option
Option 3)
450V, 13.5A
This is incorrect option
Option 4)
600V, 15A
This is incorrect option