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Question: In a transformer, the number of turns in primary coil and secondary coil are 5 and 4 respectively. I...

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

A

4 : 5

B

5 : 4

C

5 : 9

D

9 : 5

Answer

4 : 5

Explanation

Solution

NsNp=ipis⇒ipis=45\frac{N_{s}}{N_{p}} = \frac{i_{p}}{i_{s}} \Rightarrow \frac{i_{p}}{i_{s}} = \frac{4}{5}