186- The self-inductance coefficient of a solenoid is $2\ \text{H}$ and a current of $0.4\ \text{A}$ passes through it. With which condition does a self-induced EMF of $6\ \text{V}$ get produced in the solenoid?
[(1)] The electrical resistance across it is $15\ \Omega$.
[(2)] The electrical current changes at a rate of $\frac{\text{A}}{\text{s}}$ with a rate of $15\ \frac{\text{A}}{\text{s}}$.
[(3)] The electrical resistance across it is $3\ \Omega$.
[(4)] The electrical current changes at a rate of $3\ \frac{\text{A}}{\text{s}}$.
\textbf{186-} The self-inductance coefficient of a solenoid is $2\ \text{H}$ and a current of $0.4\ \text{A}$ passes through it. With which condition does a self-induced EMF of $6\ \text{V}$ get produced in the solenoid?
\begin{enumerate}
\item[(1)] The electrical resistance across it is $15\ \Omega$.
\item[(2)] The electrical current changes at a rate of $\frac{\text{A}}{\text{s}}$ with a rate of $15\ \frac{\text{A}}{\text{s}}$.
\item[(3)] The electrical resistance across it is $3\ \Omega$.
\item[(4)] The electrical current changes at a rate of $3\ \frac{\text{A}}{\text{s}}$.
\end{enumerate}