Electro Magnetic Induction And Alternating Currents Question 245
Question: The primary winding of a transformer has 100 turns and its secondary winding has 200 turns. The primary is connected to an ac supply of 120 V and the current flowing in it is 10 A. The voltage and the current in the secondary are [MP PMT 1991; DPMT 2004]
Options:
A) 240 V, 5 A
B) 240 V, 10 A
C) 60 V, 20 A
D) 120 V, 20 A
Show Answer
Answer:
Correct Answer: A
Solution:
$ \frac{N_{s}}{N_{p}}=\frac{V_{s}}{V_{p}}\Rightarrow \frac{200}{100}=\frac{V_{s}}{120}\Rightarrow V_{s}=240\ V $ also $ \frac{V_{s}}{V_{p}}=\frac{i_{p}}{i_{s}}\Rightarrow \frac{240}{120}=\frac{10}{i_{s}}\Rightarrow i_{s}=5\ A $
