Electro Magnetic Induction And Alternating Currents Question 261

Question: In a transformer, the number of turns in primary coil and secondary coil are 5 and 4 respectively. If 240 V is applied on the primary coil, then the ratio of current in primary and secondary coil is [AFMC 1998; CPMT 2000; Pb. PET 2002]

Options:

A) 4 : 5

B) 5 : 4

C) 5 : 9

D) 9 : 5

Show Answer

Answer:

Correct Answer: A

Solution:

$ \frac{N_{s}}{N_{p}}=\frac{i_{p}}{i_{s}}\Rightarrow \frac{i_{p}}{i_{s}}=\frac{4}{5} $



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