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

Correct answer: (C) 2 ~A. Transformation ratio, fracI_PI_S=fracn_Sn_S i.e. frac3I_S=3/2 or, I_S=2 ~A

Q104 / 120 · VITEEE 2012 · Physics

The turn ratio of transformers is given as $2: 3 .$ If the current through the primary coil is $3 \mathrm{~A}$, thus calculate the current through load resistance

A
$1 \mathrm{~A}$
B
$4.5 \mathrm{~A}$
Correct answer
C
$2 \mathrm{~A}$
D
$1.5 \mathrm{~A}$

Solution

Transformation ratio, $\frac{\mathrm{I}_{\mathrm{P}}}{\mathrm{I}_{\mathrm{S}}}=\frac{\mathrm{n}_{\mathrm{S}}}{\mathrm{n}_{\mathrm{S}}}$ i.e. $\frac{3}{\mathrm{I}_{\mathrm{S}}}=\frac{3}{2}$ or, $\mathrm{I}_{\mathrm{S}}=2 \mathrm{~A}$

Hence, the correct answer is option: 'C'.

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