Subject:
PhysicsAuthor:
lesliejimenezCreated:
1 year agoAnswer:
i don't know the answer. .cufhzj
Author:
litzychoi
Rate an answer:
7Answer:
Correct option is D
Given,
The mains current is 0.5A.
The mains voltage is 220V.
Power of light = 100W and voltage V= 110V
The efficiency is n= (output/input) ×100
= 100/(220×0.5) ×100
=90.9
The approximate efficiency of transformer is 90%.
Therefore the correct option D.
Author:
joliekmka
Rate an answer:
3