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 $



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