(C) For an ideal transformer with $100\%$ efficiency, the input power equals the output power: $P_{in} = P_{out}$.Since $P = V \cdot I$, we have $V_p

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(C) For an ideal transformer with $100\%$ efficiency, the input power equals the output power: $P_{in} = P_{out}$.Since $P = V \cdot I$, we have $V_p \cdot I_p = V_s \cdot I_s$.The transformer ratio is given by $\frac{V_p}{V_s} = \frac{n_p}{n_s} = \frac{I_s}{I_p}$.Given $\frac{n_p}{n_s} = 20:1$ and $I_s = 80\,A$.Substituting the values: $\frac{I_s}{I_p} = \frac{n_p}{n_s} \implies \frac{80}{I_p} = \frac{20}{1}$.Solving for $I_p$: $I_p = \frac{80}{20} = 4\,A$.

Class 12 Physics Electromagnetic Induction Transformer

Difficult

$A$ step-down transformer is connected to a $2400\,V$ line, and $80\,A$ of current is found to flow in the output load. The ratio of the turns in the primary and secondary coil is $20:1$. If the transformer efficiency is $100\%$, then the current flowing in the primary coil will be......$A$.

A
$1600$
B
$20$
C
$4$
D
$1.5$

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Electromagnetic Induction

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Transformer

The number of turns in the primary and secondary coils of a transformer are $50$ and $200$ respectively. If the current in the primary coil is $4 \,A$, then the current in the secondary coil is: (in $\,A$)

MediumAP EAMCET 2008

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In a step-up transformer, the turn ratio is $1:10$. A resistance of $200 \, \Omega$ connected across the secondary is drawing a current of $0.5 \, A$. What is the primary voltage and current?

Medium

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Voltage in the secondary coil of a transformer does not depend upon.

Easy

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An ideal transformer converts $220 \ V$ $AC$ to $3.3 \ kV$ $AC$ to transmit a power of $4.4 \ kW$. If the primary coil has $600$ turns,then the alternating current in the secondary coil is:

MediumMHT CET 2025

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In an ideal step-up transformer,the number of turns in the primary coil and secondary coil are $100$ and $200$ respectively. If the output current is found to be $5 \text{ A}$,then the input current will be . . . . . . . (in $\text{ A}$)

DifficultGUJCET 2026

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$A$ step-down transformer is connected to a $2400\,V$ line, and $80\,A$ of current is found to flow in the output load. The ratio of the turns in the primary and secondary coil is $20:1$. If the transformer efficiency is $100\%$, then the current flowing in the primary coil will be......$A$.

Similar Questions

The number of turns in the primary and secondary coils of a transformer are $50$ and $200$ respectively. If the current in the primary coil is $4 \,A$, then the current in the secondary coil is: (in $\,A$)

In a step-up transformer, the turn ratio is $1:10$. A resistance of $200 \, \Omega$ connected across the secondary is drawing a current of $0.5 \, A$. What is the primary voltage and current?

Voltage in the secondary coil of a transformer does not depend upon.

An ideal transformer converts $220 \ V$ $AC$ to $3.3 \ kV$ $AC$ to transmit a power of $4.4 \ kW$. If the primary coil has $600$ turns,then the alternating current in the secondary coil is:

In an ideal step-up transformer,the number of turns in the primary coil and secondary coil are $100$ and $200$ respectively. If the output current is found to be $5 \text{ A}$,then the input current will be . . . . . . . (in $\text{ A}$)

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