Electro Magnetic Induction And Alternating Currents Question 269
Question: A transformer has 100 turns in the primary coil and carries 8 A current. If input power is one kilowatt, the number of turns required in the secondary coil to have 500V output will be [MP PET 2002]
Options:
A) 100
B) 200
C) 400
D) 300
Show Answer
Answer:
Correct Answer: C
Solution:
$ P_{s}=V_{s}i_{s}\Rightarrow 1000=V_{s}\times 8\Rightarrow V_{s}=\frac{1000}{8} $ $ \frac{V_{p}}{V_{s}}=\frac{N_{p}}{N_{s}}\Rightarrow \frac{(1000/8)}{500}=\frac{100}{N_{s}}\Rightarrow N_{s}=400 $
