A step-down transformer reduces the voltage of a transmission line from 2200V to 220V. The power delivered by it is 880W and its efficiency is 88%. The input current is :
A
4.65mA
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
0.045A
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
0.45A
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
4.65A
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is A0.45A Efficiency of transformer, η=Output powerInput power ⇒88100=880Pi ⇒Pi=1000W Input current, Ip=PiVi =10002200 =0.45A.