(A) The induced electromotive force $(e_2)$ in the secondary coil is given by the formula: $e_2 = M \frac{di_1}{dt}$.Since $e_2 = i_2 R_2$,we can equa

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(A) The induced electromotive force $(e_2)$ in the secondary coil is given by the formula: $e_2 = M \frac{di_1}{dt}$.Since $e_2 = i_2 R_2$,we can equate the two expressions: $i_2 R_2 = M \frac{di_1}{dt}$.Given values are: $M = 0.5 \ H$,$i_2 = 0.4 \ A$,and $R_2 = 5 \ \Omega$.Substituting these values into the equation: $0.4 \times 5 = 0.5 \times \frac{di_1}{dt}$.$2.0 = 0.5 \times \frac{di_1}{dt}$.Therefore,$\frac{di_1}{dt} = \frac{2.0}{0.5} = 4 \ A/s$.

Class 12 Physics Electromagnetic Induction Transformer

Difficult

In a transformer,the mutual inductance between the primary and secondary coils is $0.5 \ H$. The resistances of the primary and secondary coils are $20 \ \Omega$ and $5 \ \Omega$ respectively. To induce a current of $0.4 \ A$ in the secondary coil,what is the required rate of change of current in the primary coil in $A/s$?

A
$4$
B
$16$
C
$1.6$
D
$8$

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Class 12 Questions

Class 12

Physics Questions

Chapter

Electromagnetic Induction

Subtopic

Transformer

$A$ $220\, V$ input is supplied to a transformer. The output circuit draws a current of $2.0\, A$ at $440\, V$. If the efficiency of the transformer is $80\%$,the current drawn by the primary windings of the transformer is ..... $A$.

MediumAIPMT 2010

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Write two types of transformer.

Easy

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The ratio of secondary to primary turns is $9:4$. If power input is $P$, what will be the ratio of power output (neglect all losses) to power input?

Easy

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Primary side of a transformer is connected to $230 \ V, 50 \ Hz$ supply. The turns ratio of primary to secondary winding is $10:1$. The load resistance connected to the secondary side is $46 \ \Omega$. The power consumed in it is: (in $W$)

DifficultJEE MAIN 2024

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The ratio of secondary to primary turns in a transformer is $3 : 2$. If the power output is $P$,then the input power,neglecting all losses,must be equal to:

Easy

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$A$ $220\, V$ input is supplied to a transformer. The output circuit draws a current of $2.0\, A$ at $440\, V$. If the efficiency of the transformer is $80\%$,the current drawn by the primary windings of the transformer is ..... $A$.

Write two types of transformer.

The ratio of secondary to primary turns is $9:4$. If power input is $P$, what will be the ratio of power output (neglect all losses) to power input?

Primary side of a transformer is connected to $230 \ V, 50 \ Hz$ supply. The turns ratio of primary to secondary winding is $10:1$. The load resistance connected to the secondary side is $46 \ \Omega$. The power consumed in it is: (in $W$)

The ratio of secondary to primary turns in a transformer is $3 : 2$. If the power output is $P$,then the input power,neglecting all losses,must be equal to:

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