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When switch S in the figure is open, the voltmeter V of the battery reads 3.09 V. When the switch is closed, the voltmeter reading drops to 2.97 V, and the ammeter A reads 1.70 A . Assume that the two meters are ideal, so they do not affect the circuit. ( Figure 1) Part A Find the emf E. Express your answer in volts to three significant digits. ε = 197| ΑΣΦΑ ? V

When switch S in the figure is open, the voltmeter V of the battery reads 3.09 V. When the switch is closed, the voltmeter reading drops to 2.97 V, and the ammeter A reads 1.70 A . Assume that the two meters are ideal, so they do not affect the circuit. ( Figure 1) Part A Find the emf E. Express your answer in volts to three significant digits. ε = 197| ΑΣΦΑ ? V

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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a)Find the emf.

 

b)Find the internal resistance of the battery.

 

c)Find the circuit resistance.

This image depicts a basic electric circuit diagram. It consists of several key components: 1. **Voltage Source (ε):** Represented by a cell with '+' and '-' signs, indicating the positive and negative terminals. 2. **Internal Resistance (r):** The small resistor next to the voltage source, within the shaded block, symbolizes the internal resistance of the voltage source. 3. **External Resistance (R):** The resistor labeled \( R \) is in series with the internal resistance and represents the external load in the circuit. 4. **Switch (S):** This is drawn as a break in the circuit that can be closed to complete the circuit, allowing current to flow. 5. **Voltmeter (V):** Positioned parallel to the voltage source, it measures the potential difference across the source. 6. **Ammeter (A):** Connected in series with the circuit, it measures the total current flowing through the circuit. The circuit is a simple representation used to understand the relationships between voltage, current, and resistance as described by Ohm's Law. The placement of the voltmeter and ammeter demonstrates proper measurement techniques in an electrical circuit setup, with the voltmeter connected in parallel and the ammeter in series.
Transcribed Image Text:This image depicts a basic electric circuit diagram. It consists of several key components: 1. **Voltage Source (ε):** Represented by a cell with '+' and '-' signs, indicating the positive and negative terminals. 2. **Internal Resistance (r):** The small resistor next to the voltage source, within the shaded block, symbolizes the internal resistance of the voltage source. 3. **External Resistance (R):** The resistor labeled \( R \) is in series with the internal resistance and represents the external load in the circuit. 4. **Switch (S):** This is drawn as a break in the circuit that can be closed to complete the circuit, allowing current to flow. 5. **Voltmeter (V):** Positioned parallel to the voltage source, it measures the potential difference across the source. 6. **Ammeter (A):** Connected in series with the circuit, it measures the total current flowing through the circuit. The circuit is a simple representation used to understand the relationships between voltage, current, and resistance as described by Ohm's Law. The placement of the voltmeter and ammeter demonstrates proper measurement techniques in an electrical circuit setup, with the voltmeter connected in parallel and the ammeter in series.
**Transcription for Educational Website** --- In the given scenario, when switch \( S \) in the figure is open, the voltmeter \( V \) measures the battery's voltage as \( 3.09 \, \text{V} \). When the switch is closed, the voltmeter reading decreases to \( 2.97 \, \text{V} \), and the ammeter \( A \) shows a current of \( 1.70 \, \text{A} \). It is assumed that the two meters are ideal, meaning their presence does not affect the circuit (refer to Figure 1 for the circuit diagram). ### Part A **Problem Statement:** Find the electromotive force (emf) \( \mathcal{E} \). **Instruction:** Express your answer in volts, rounded to three significant digits. **Input Field:** There is a field provided for entering the calculated value of \( \mathcal{E} \), which will automatically append the unit \( V \) (volts) to your answer. **Diagram Description:** Unfortunately, Figure 1 is not provided here, but it presumably includes a simple circuit with a battery, voltmeter, ammeter, switch, and resistive elements to measure the changes mentioned. ---
Transcribed Image Text:**Transcription for Educational Website** --- In the given scenario, when switch \( S \) in the figure is open, the voltmeter \( V \) measures the battery's voltage as \( 3.09 \, \text{V} \). When the switch is closed, the voltmeter reading decreases to \( 2.97 \, \text{V} \), and the ammeter \( A \) shows a current of \( 1.70 \, \text{A} \). It is assumed that the two meters are ideal, meaning their presence does not affect the circuit (refer to Figure 1 for the circuit diagram). ### Part A **Problem Statement:** Find the electromotive force (emf) \( \mathcal{E} \). **Instruction:** Express your answer in volts, rounded to three significant digits. **Input Field:** There is a field provided for entering the calculated value of \( \mathcal{E} \), which will automatically append the unit \( V \) (volts) to your answer. **Diagram Description:** Unfortunately, Figure 1 is not provided here, but it presumably includes a simple circuit with a battery, voltmeter, ammeter, switch, and resistive elements to measure the changes mentioned. ---
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