The turn ratio of a transformers is given as `2:3`. If the current through the primary coil is `3 A`, thus calculate the current through load resistance

Options

A. 1A
B. 4.5 A
C. `2 A`
D. 1.5 A

Answer

C

Explanation

If ` i_(s) and i_(p)` be the currents in the primary and secondary at any instant and the energy losses by zero, then
Power in secondary = power in primary
` V_(s) xx i_(s) = V_(p) xx i_(p)`
` Rightarrow i_(p)/i_(s) = V_(s)/V_(p) = N_(s)/N_(p) `= transformer ration
Given ,` N_(p)/N_(s0 = 2/3 , i_(p) = 3A`
` Rightarrow i_(s) = N_(p)/N_(s) i_(p) = 2/3 xx 3 = 2A`