Electro Magnetic Induction And Alternating Currents Question 256
Question: A step up transformer connected to a 220 V AC line is to supply 22 kV for a neon sign in secondary circuit. In primary circuit a fuse wire is connected which is to blow when the current in the secondary circuit exceeds 10 mA. The turn ratio of the transformer is [MP PET 1997]
Options:
A) 50
B) 100
C) 150
D) 200
Show Answer
Answer:
Correct Answer: B
Solution:
$ \frac{N_{s}}{N_{p}}=\frac{V_{s}}{V_{p}}=\frac{22000}{220}=100 $
