(B) For an ideal transformer, the input power is equal to the output power.$P_{in} = P_{out}$Since $P_{out} = 60\,W$ (power of the lamp) and $P_{in} =

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(B) For an ideal transformer, the input power is equal to the output power.$P_{in} = P_{out}$Since $P_{out} = 60\,W$ (power of the lamp) and $P_{in} = V_P \times I_P$, where $V_P = 220\,V$ is the primary voltage.$220 \times I_P = 60$$I_P = \frac{60}{220}$$I_P \approx 0.27\,A$Therefore, the current in the primary winding is $0.27\,A$.

Class 12 Physics Electromagnetic Induction Transformer

Easy

$A$ $12\,V, 60\,W$ lamp is connected to the secondary of a step-down transformer, whose primary is connected to $AC$ mains of $220\,V$. Assuming the transformer to be ideal, the current in the primary winding is $..........\,A$.

NEET 2023 All NEET

A
$0.37$
B
$0.27$
C
$2.7$
D
$3.7$

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Electromagnetic Induction

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Transformer

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$A$ $12\,V, 60\,W$ lamp is connected to the secondary of a step-down transformer, whose primary is connected to $AC$ mains of $220\,V$. Assuming the transformer to be ideal, the current in the primary winding is $..........\,A$.

Similar Questions

$A$ current of $4 \text{ A}$ is flowing at $230 \text{ V}$ in the primary coil of a transformer. If the voltage produced in the secondary coil is $2300 \text{ V}$ and $40\%$ of power is lost, then the current in the secondary will be (in $\text{ A}$)

$A$ transformer is used to light a $100\,W$ and $110\,V$ lamp from a $220\,V$ main. If the main current is $0.5\,A$, the efficiency of the transformer is approximately .....$\%$

In an ideal transformer, can power increase or decrease? State whether this statement is true or false.

"In a step-down transformer, the output current decreases." This statement is true or false?

In an ideal transformer,the turns ratio is $\frac{N_p}{N_S} = \frac{1}{2}$. The ratio $V_s : V_p$ is equal to (the symbols carry their usual meaning):

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