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Question

(B) The input power to the transformer is given by $P_{	ext{in}} = V_1 I_1$.The output power from the transformer is given by $P_{	ext{out}} = V_2 I

Vedclass · Accepted Answer

$\frac{I_1 V_1}{I_2 V_2}$

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(B) The input power to the transformer is given by $P_{	ext{in}} = V_1 I_1$.The output power from the transformer is given by $P_{	ext{out}} = V_2 I_2$.The ratio of input power to output power is $\frac{P_{	ext{in}}}{P_{	ext{out}}} = \frac{V_1 I_1}{V_2 I_2}$.Assuming an ideal transformer,the input power equals the output power,so the ratio is $1:1$. However,based on the provided options and the general definition of power,the ratio is $\frac{V_1 I_1}{V_2 I_2}$. Since this specific expression is not explicitly listed in the options,we re-evaluate the question context. In many textbook problems,if the transformer is assumed to be ideal,the ratio is $1$. Given the options provided,option $B$ represents the ratio of input power to output power.

$A$ step-down transformer is used to reduce the main supply from $V_1$ volt to $V_2$ volt. The primary coil draws a current $I_1$ $A$ and the secondary coil draws $I_2$ $A$. $(I_1 < I_2)$. The ratio of input power to output power is

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