Electro Magnetic Induction And Alternating Currents Question 248
Question: An ideal transformer has 100 turns in the primary and 250 turns in the secondary. The peak value of the ac is 28 V. The r.m.s. secondary voltage is nearest to [MP PMT 1992]
Options:
A) 50 V
B) 70 V
C) 100 V
D) 40 V
Show Answer
Answer:
Correct Answer: A
Solution:
$ \frac{N_{s}}{N_{p}}=\frac{V_{s}}{V_{p}}\Rightarrow \frac{250}{100}=\frac{V_{s}}{28/\sqrt{2}}\Rightarrow V_{s}=50\ V $
