A 15 V battery is connected in series with three resistors: R1 = 20 ohm, R2 = 50 ohm, R3= 80 ohm. Find the voltage across each resistor R1

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A 15 V battery is connected in series with three resistors: R1 = 20 ohm, R2 = 50 ohm, R3= 80 ohm. Find the voltage across each resistor R1

### Series Circuit with Three Resistors

The given diagram illustrates a simple electrical series circuit consisting of three resistors (\(R_1\), \(R_2\), and \(R_3\)) and a power source (\(V_S\)).

#### Components:

1. **Voltage Source (\(V_S\))**:
    - Represented by a circle with a plus (\(+\)) and minus (\(-\)) sign, indicating the positive and negative terminals of the source.
    - The voltage source supplies electrical energy to the circuit.

2. **Resistor \(R_1\)**:
    - Located immediately after the voltage source along the path of the current.
    - The voltage drop across this resistor is labeled as \(V_1\).

3. **Resistor \(R_2\)**:
    - Located after \(R_1\) and in series with it.
    - The voltage drop across this resistor is labeled as \(V_2\).

4. **Resistor \(R_3\)**:
    - Located after \(R_2\) and also in series with it.
    - The voltage drop across this resistor is labeled as \(V_3\).

#### Key Points:

- **Series Circuit**:
    - In a series circuit, all components are connected end-to-end to form a single path for the current to flow.
    - The current is the same through each component.
    - The total resistance (\(R_{total}\)) is the sum of the individual resistances:
      \[
      R_{total} = R_1 + R_2 + R_3
      \]

- **Voltage Drops**:
    - The total voltage supplied by the source (\(V_S\)) is equal to the sum of the voltage drops across each resistor:
      \[
      V_S = V_1 + V_2 + V_3
      \]

This diagram is a fundamental example commonly used in introductory physics and electrical engineering courses to illustrate the principles of series circuits. Understanding this model helps in analyzing more complex circuits and in grasping the basics of electrical resistance and voltage division in series configurations.
Transcribed Image Text:### Series Circuit with Three Resistors The given diagram illustrates a simple electrical series circuit consisting of three resistors (\(R_1\), \(R_2\), and \(R_3\)) and a power source (\(V_S\)). #### Components: 1. **Voltage Source (\(V_S\))**: - Represented by a circle with a plus (\(+\)) and minus (\(-\)) sign, indicating the positive and negative terminals of the source. - The voltage source supplies electrical energy to the circuit. 2. **Resistor \(R_1\)**: - Located immediately after the voltage source along the path of the current. - The voltage drop across this resistor is labeled as \(V_1\). 3. **Resistor \(R_2\)**: - Located after \(R_1\) and in series with it. - The voltage drop across this resistor is labeled as \(V_2\). 4. **Resistor \(R_3\)**: - Located after \(R_2\) and also in series with it. - The voltage drop across this resistor is labeled as \(V_3\). #### Key Points: - **Series Circuit**: - In a series circuit, all components are connected end-to-end to form a single path for the current to flow. - The current is the same through each component. - The total resistance (\(R_{total}\)) is the sum of the individual resistances: \[ R_{total} = R_1 + R_2 + R_3 \] - **Voltage Drops**: - The total voltage supplied by the source (\(V_S\)) is equal to the sum of the voltage drops across each resistor: \[ V_S = V_1 + V_2 + V_3 \] This diagram is a fundamental example commonly used in introductory physics and electrical engineering courses to illustrate the principles of series circuits. Understanding this model helps in analyzing more complex circuits and in grasping the basics of electrical resistance and voltage division in series configurations.
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