(B) The power consumed by $10$ ovens is given by $P = 10 \times V \times I$.Given $V = 220 \ V$ and $I = 20 \ A$,we have:$P = 10 \times 220 \times 20

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(B) The power consumed by $10$ ovens is given by $P = 10 \times V \times I$.Given $V = 220 \ V$ and $I = 20 \ A$,we have:$P = 10 \times 220 \times 20 = 44,000 \ W = 44 \ kW$.Let $P'$ be the input power to the transformer. Since the efficiency $\eta = 90 \% = 0.9$,we have $P = \eta \times P'$.$P' = \frac{P}{0.9} = \frac{44 \ kW}{0.9} \approx 48.89 \ kW$.The power dissipated as heat in the transformer is $H = P' - P$.$H = 48.89 \ kW - 44 \ kW = 4.89 \ kW$.Rounding to the nearest option,$H \approx 4.9 \ kW$.

Class 12 Physics Electromagnetic Induction Transformer

Easy

$A$ distribution transformer with an efficiency of $90 \%$ supplies power to a colony of $10$ homes. All the $10$ homes have an electrical oven running at the same time,each drawing $20 \ A$ current from $220 \ V$ lines. The power dissipated as heat in the transformer is: (in $kW$)

TS EAMCET 2018 All TS EAMCET

A
$12.2$
B
$4.9$
C
$8.4$
D
$9.9$

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Electromagnetic Induction

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Transformer

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TS EAMCET 2018 Paper All TS EAMCET years →

The primary and secondary coils of a transformer have $50$ and $1500$ turns respectively. If the magnetic flux $\phi = \phi_0 + 4t$,where $\phi$ is in webers,$t$ is time in seconds and $\phi_0$ is a constant,the output voltage across the secondary coil is......$V$

DifficultAIPMT 2007

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$A$ transformer has a turn ratio of $100/1$. If the secondary coil has a $4 \, A$ current,then the current in the primary coil is......$A$

Easy

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$A$ transformer has $20$ turns in the primary and $100$ turns in the secondary coil. An $AC$ voltage of $V_{\text{in}} = 600 \sin 314t$ is applied to the primary terminal of the transformer. The maximum value of the secondary output voltage obtained in volts is:

MediumMHT CET 2023

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In a step-down transformer,the number of turns in:

EasyMHT CET 2012

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$A$ current of $5 \,A$ is flowing at $220 \,V$ in the primary coil of a transformer. If the voltage produced in the secondary coil is $2200 \,V$ and $50 \%$ of power is lost, then the current in the secondary will be (in $A$)

EasyMHT CET 2022

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$A$ distribution transformer with an efficiency of $90 \%$ supplies power to a colony of $10$ homes. All the $10$ homes have an electrical oven running at the same time,each drawing $20 \ A$ current from $220 \ V$ lines. The power dissipated as heat in the transformer is: (in $kW$)

Similar Questions

The primary and secondary coils of a transformer have $50$ and $1500$ turns respectively. If the magnetic flux $\phi = \phi_0 + 4t$,where $\phi$ is in webers,$t$ is time in seconds and $\phi_0$ is a constant,the output voltage across the secondary coil is......$V$

$A$ transformer has a turn ratio of $100/1$. If the secondary coil has a $4 \, A$ current,then the current in the primary coil is......$A$

$A$ transformer has $20$ turns in the primary and $100$ turns in the secondary coil. An $AC$ voltage of $V_{\text{in}} = 600 \sin 314t$ is applied to the primary terminal of the transformer. The maximum value of the secondary output voltage obtained in volts is:

In a step-down transformer,the number of turns in:

$A$ current of $5 \,A$ is flowing at $220 \,V$ in the primary coil of a transformer. If the voltage produced in the secondary coil is $2200 \,V$ and $50 \%$ of power is lost, then the current in the secondary will be (in $A$)

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