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In the circuit shown below, the switch wa connected to position $1$ at $t<0$ and at $t=0$, it is changed to position $2$. Assume that $y$ the diode has zero voltage drop and a storage time $t_{s}$. For $0 < t \leq t_{s}, \text{V}_{\text{R}}$ is given by (all in volts)

  1. $\text{V}_{\mathrm{R}}=-5$
  2. $\mathrm{V}_{\mathrm{R}}=+5$
  3. $0 \leq \mathrm{V}_{\mathrm{R}}<5$
  4. $-5 < \mathrm{V}_{\mathrm{R}} < 0$
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