Transformer efficiency lamp calculation (Jee Ma… | ExamDuo
Ask Doubts
Log in
AC Devices
Medium
Transformer efficiency lamp calculation
A transformer is used to light 140 W, 24V lamp from 240 V AC mains. The current in the mains is 0.7 A. The efficiency of transformer is nearest to
SELECT ONE OPTION
A
90%
B
80%
C
70%
D
60%
Check
Ask about this question