---
title: "A non-ideal battery with electromotive force \\(\\varepsilon\\) and internal resistance \\(r\\) is connected to a circuit containing a resistor \\(R_1\\) in series with a parallel combination of two identical resistors, \\(R_2\\) and \\(R_3\\). Switch \\(S\\) is initially open. When switch \\(S\\) is closed, a third identical resistor \\(R_4\\) is connected in parallel with \\(R_2\\) and \\(R_3\\).  | | Battery Terminal Voltage \\(V_{\\text{term}}\\) | Power Dissipated by \\(R_2\\) | | :— | :— | :— | | (A) | Decreases | Decreases | | (B) | Decreases | Increases | | (C) | Remains the same | Decreases | | (D) | Increases | Increases |  Which row in the table correctly indicates how the terminal voltage of the battery and the power dissipated by resistor \\(R_2\\) change after switch \\(S\\) is closed?"
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url: "https://nerd-notes.com/ubq/117401/"
date_modified: "2026-08-04T06:52:04+00:00"
---

# A non-ideal battery with electromotive force \(\varepsilon\) and internal resistance \(r\) is connected to a circuit containing a resistor \(R_1\) in series with a parallel combination of two identical resistors, \(R_2\) and \(R_3\). Switch \(S\) is initially open. When switch \(S\) is closed, a third identical resistor \(R_4\) is connected in parallel with \(R_2\) and \(R_3\).

| | Battery Terminal Voltage \(V_{\text{term}}\) | Power Dissipated by \(R_2\) |
| :— | :— | :— |
| (A) | Decreases | Decreases |
| (B) | Decreases | Increases |
| (C) | Remains the same | Decreases |
| (D) | Increases | Increases |

Which row in the table correctly indicates how the terminal voltage of the battery and the power dissipated by resistor \(R_2\) change after switch \(S\) is closed?

A non-ideal battery with electromotive force \(\varepsilon\) and internal resistance \(r\) is connected to a circuit containing a resistor \(R_1\) in series with a parallel combination of two identical resistors, \(R_2\) and \(R_3\). Switch \(S\) is initially open. When switch \(S\) is closed, a third identical resistor \(R_4\) is connected in parallel with \(R_2\) and \(R_3\).

| | Battery Terminal Voltage \(V_{\text{term}}\) | Power Dissipated by \(R_2\) |
| :--- | :--- | :--- |
| (A) | Decreases | Decreases |
| (B) | Decreases | Increases |
| (C) | Remains the same | Decreases |
| (D) | Increases | Increases |

Which row in the table correctly indicates how the terminal voltage of the battery and the power dissipated by resistor \(R_2\) change after switch \(S\) is closed?

![A schematic circuit diagram drawn in a rectangular layout. On the left vertical branch is a non-ideal battery enclosed in a light gray dashed box labeled "Battery". Inside the dashed box is a standard DC voltage source symbol labeled \varepsilon with a positive terminal at the top and a small resistor symbol labeled r in series above it. From the top of the battery box, a wire extends horizontally to the right through a resistor labeled R_1. After R_1, the wire splits into three parallel vertical branches. The first parallel branch contains a resistor labeled R_2. The second parallel branch contains a resistor labeled R_3. The third parallel branch contains an open switch labeled S in series with a resistor labeled R_4. Below the parallel branches, the wires recombine into a single horizontal wire that returns to the bottom negative terminal of the battery. No other labels, lines, text, or components appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1785826323-DNAdkH.jpg)

- **A.** Decreases | Decreases
- **B.** Decreases | Increases
- **C.** Remains the same | Decreases
- **D.** Increases | Increases

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/117401/*