(A) The solenoid is connected to a $DC$ source with a constant $emf$ $(V)$.The current in the solenoid is given by $I = V/R$,where $R$ is the resistan

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(A) The solenoid is connected to a $DC$ source with a constant $emf$ $(V)$.The current in the solenoid is given by $I = V/R$,where $R$ is the resistance of the solenoid wire.When the iron core is pulled out,the self-inductance $(L)$ of the solenoid changes,but the resistance $(R)$ of the wire remains constant.Since the $DC$ source provides a constant $emf$ and the resistance of the circuit does not change,the steady-state current $I$ remains unchanged.Therefore,the current will remain the same.

Class 12 Physics Electromagnetic Induction Self Induction

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Consider a solenoid carrying current supplied by a $DC$ source with a constant $emf$ containing an iron core inside it. When the core is pulled out of the solenoid,the change in current will:

TS EAMCET 2017 All TS EAMCET

A
remain same
B
decrease
C
increase
D
modulate

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Electromagnetic Induction

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Self Induction

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DifficultJEE MAIN 2024

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When the current in a coil changes from $8 \; A$ to $2 \; A$ in $3 \times 10^{-2} \; s$,the $e.m.f.$ induced in the coil is $2 \; V$. The self-inductance of the coil (in $mH$) is:

Easy

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The current passing through a choke coil of $5 \, H$ is decreasing at the rate of $2 \, A/s$. The $e.m.f.$ developed across the coil is ....... $V$.

EasyAIIMS 1997

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Consider a solenoid carrying current supplied by a $DC$ source with a constant $emf$ containing an iron core inside it. When the core is pulled out of the solenoid,the change in current will:

Similar Questions

$A$ long solenoid has $500$ turns. When a current of $2 \,A$ is passed through it, the resulting magnetic flux linked with each turn of the solenoid is $4 \times 10^{-3} \,Wb$. The self-inductance of the solenoid is: (in $\,H$)

Which of the following units denotes the dimension $\frac{M L^2}{Q^2}$,where $Q$ denotes the electric charge?

The current in an inductor is given by $I = (3t + 8)$ $A$,where $t$ is in seconds. The magnitude of the induced emf produced in the inductor is $12 \ mV$. The self-inductance of the inductor is . . . . . . $mH$.

When the current in a coil changes from $8 \; A$ to $2 \; A$ in $3 \times 10^{-2} \; s$,the $e.m.f.$ induced in the coil is $2 \; V$. The self-inductance of the coil (in $mH$) is:

The current passing through a choke coil of $5 \, H$ is decreasing at the rate of $2 \, A/s$. The $e.m.f.$ developed across the coil is ....... $V$.

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