Electro Magnetic Induction And Alternating Currents Question 210
Question: A transformer is used to light a 140 W, 24 V bulb from a 240 V a.c. mains. The current in the main cable is 0.7 A. The efficiency of the transformer is
Options:
A)
B)
C)
D)
Show Answer
Answer:
Correct Answer: B
Solution:
- Power of source
Efficiency
