Last updated on Sep 22, 2026

22.2 – Investigating Resistance in Series and Parallel (Leaving Cert Physics): Flashcards

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22.2 – Investigating Resistance in Series and Parallel

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Goal of resistance experiment

Understand how combining resistors affects total resistance

Series connection definition

Resistors connected one after another in single path

Series resistance formula

$R_{total} = R_1 + R_2 + R_3 + ...$

Series resistance calculation

Sum of all individual resistances

Series: total vs individual resistance

Always greater than any single resistor

Parallel connection definition

Resistors side-by-side, creating multiple current paths

Parallel resistance formula

$\frac{1}{R_{total}} = \frac{1}{R_1} + \frac{1}{R_2} + ...$

Parallel: total vs smallest resistance

Always less than smallest individual resistor

Why parallel resistance is lower

Multiple paths reduce opposition to current flow

Combined circuit analysis order

Calculate parallel sections first, then treat as series

Ohmmeter function

Instrument for measuring resistance

Current flow in series

Flows through each resistor in turn

Explore Leaving Cert Physics Revision Notes by Topics

3.1 – Calculations of Refraction of Light

3.1 – Calculations of Refraction of Light

3.2 – Measuring the Critical Angle and Refractive Index

3.2 – Measuring the Critical Angle and Refractive Index

4.1 – Verifying the Lens Equation

4.1 – Verifying the Lens Equation

5.1 – Investigating Constant Velocity Using a Trolley or Rider

5.1 – Investigating Constant Velocity Using a Trolley or Rider

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.2 – Determining Acceleration Due to Gravity

6.2 – Determining Acceleration Due to Gravity

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

7.1 – Verifying the Law of Vector Addition

7.1 – Verifying the Law of Vector Addition

Show more

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.2 – Determining Acceleration Due to Gravity

6.2 – Determining Acceleration Due to Gravity

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

7.1 – Verifying the Law of Vector Addition

7.1 – Verifying the Law of Vector Addition

8.1 – Investigating Force, Mass and Acceleration Relationships

8.1 – Investigating Force, Mass and Acceleration Relationships

8.2 – Investigating Conservation of Momentum

8.2 – Investigating Conservation of Momentum

9.1 – Determining Acceleration Due to Gravity

9.1 – Determining Acceleration Due to Gravity

10.1 – Investigating Conservation of Energy on a Ramp

10.1 – Investigating Conservation of Energy on a Ramp

12.1 – Investigating Work and Energy in Stretching or Compression

12.1 – Investigating Work and Energy in Stretching or Compression

12.2 – Verifying Hooke’s Law

12.2 – Verifying Hooke’s Law

13.1 – Investigating Alcohol as a Thermometer Liquid

13.1 – Investigating Alcohol as a Thermometer Liquid

14.1 – Determining the Specific Heat Capacity of a Liquid

14.1 – Determining the Specific Heat Capacity of a Liquid

14.2 – Determining the Latent Heat of Fusion and Vaporisation

14.2 – Determining the Latent Heat of Fusion and Vaporisation

16.1 – Verifying the Stretching of a Spring (Tension Model)

16.1 – Verifying the Stretching of a Spring (Tension Model)

17.1 – Measuring the Wavelength of Light

17.1 – Measuring the Wavelength of Light

22.1 – Investigating Current and Voltage Relationships

22.1 – Investigating Current and Voltage Relationships

22.2 – Investigating Resistance in Series and Parallel

22.2 – Investigating Resistance in Series and Parallel

22.3 – Investigating the Effect of Temperature on Resistance

22.3 – Investigating the Effect of Temperature on Resistance

23.1 – Investigating Current and Voltage in a Filament Lamp

23.1 – Investigating Current and Voltage in a Filament Lamp

24.1 – Investigating Current and Voltage in a Semiconductor Diode

24.1 – Investigating Current and Voltage in a Semiconductor Diode

Explore Leaving Cert Physics Model Answers by Topics

3.1 – Calculations of Refraction of Light

3.1 – Calculations of Refraction of Light

3.2 – Measuring the Critical Angle and Refractive Index

3.2 – Measuring the Critical Angle and Refractive Index

4.1 – Verifying the Lens Equation

4.1 – Verifying the Lens Equation

5.1 – Investigating Constant Velocity Using a Trolley or Rider

5.1 – Investigating Constant Velocity Using a Trolley or Rider

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.2 – Determining Acceleration Due to Gravity

6.2 – Determining Acceleration Due to Gravity

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

7.1 – Verifying the Law of Vector Addition

7.1 – Verifying the Law of Vector Addition

Show more

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.2 – Determining Acceleration Due to Gravity

6.2 – Determining Acceleration Due to Gravity

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

7.1 – Verifying the Law of Vector Addition

7.1 – Verifying the Law of Vector Addition

8.1 – Investigating Force, Mass and Acceleration Relationships

8.1 – Investigating Force, Mass and Acceleration Relationships

8.2 – Investigating Conservation of Momentum

8.2 – Investigating Conservation of Momentum

9.1 – Determining Acceleration Due to Gravity

9.1 – Determining Acceleration Due to Gravity

10.1 – Investigating Conservation of Energy on a Ramp

10.1 – Investigating Conservation of Energy on a Ramp

12.1 – Investigating Work and Energy in Stretching or Compression

12.1 – Investigating Work and Energy in Stretching or Compression

12.2 – Verifying Hooke’s Law

12.2 – Verifying Hooke’s Law

13.1 – Investigating Alcohol as a Thermometer Liquid

13.1 – Investigating Alcohol as a Thermometer Liquid

14.1 – Determining the Specific Heat Capacity of a Liquid

14.1 – Determining the Specific Heat Capacity of a Liquid

14.2 – Determining the Latent Heat of Fusion and Vaporisation

14.2 – Determining the Latent Heat of Fusion and Vaporisation

16.1 – Verifying the Stretching of a Spring (Tension Model)

16.1 – Verifying the Stretching of a Spring (Tension Model)

17.1 – Measuring the Wavelength of Light

17.1 – Measuring the Wavelength of Light

22.1 – Investigating Current and Voltage Relationships

22.1 – Investigating Current and Voltage Relationships

22.2 – Investigating Resistance in Series and Parallel

22.2 – Investigating Resistance in Series and Parallel

22.3 – Investigating the Effect of Temperature on Resistance

22.3 – Investigating the Effect of Temperature on Resistance

23.1 – Investigating Current and Voltage in a Filament Lamp

23.1 – Investigating Current and Voltage in a Filament Lamp

24.1 – Investigating Current and Voltage in a Semiconductor Diode

24.1 – Investigating Current and Voltage in a Semiconductor Diode

Explore Leaving Cert Physics Quizzes by Topics

3.1 – Calculations of Refraction of Light

3.1 – Calculations of Refraction of Light

3.2 – Measuring the Critical Angle and Refractive Index

3.2 – Measuring the Critical Angle and Refractive Index

4.1 – Verifying the Lens Equation

4.1 – Verifying the Lens Equation

5.1 – Investigating Constant Velocity Using a Trolley or Rider

5.1 – Investigating Constant Velocity Using a Trolley or Rider

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.2 – Determining Acceleration Due to Gravity

6.2 – Determining Acceleration Due to Gravity

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

7.1 – Verifying the Law of Vector Addition

7.1 – Verifying the Law of Vector Addition

Show more

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.2 – Determining Acceleration Due to Gravity

6.2 – Determining Acceleration Due to Gravity

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

7.1 – Verifying the Law of Vector Addition

7.1 – Verifying the Law of Vector Addition

8.1 – Investigating Force, Mass and Acceleration Relationships

8.1 – Investigating Force, Mass and Acceleration Relationships

8.2 – Investigating Conservation of Momentum

8.2 – Investigating Conservation of Momentum

9.1 – Determining Acceleration Due to Gravity

9.1 – Determining Acceleration Due to Gravity

10.1 – Investigating Conservation of Energy on a Ramp

10.1 – Investigating Conservation of Energy on a Ramp

12.1 – Investigating Work and Energy in Stretching or Compression

12.1 – Investigating Work and Energy in Stretching or Compression

12.2 – Verifying Hooke’s Law

12.2 – Verifying Hooke’s Law

13.1 – Investigating Alcohol as a Thermometer Liquid

13.1 – Investigating Alcohol as a Thermometer Liquid

14.1 – Determining the Specific Heat Capacity of a Liquid

14.1 – Determining the Specific Heat Capacity of a Liquid

14.2 – Determining the Latent Heat of Fusion and Vaporisation

14.2 – Determining the Latent Heat of Fusion and Vaporisation

16.1 – Verifying the Stretching of a Spring (Tension Model)

16.1 – Verifying the Stretching of a Spring (Tension Model)

17.1 – Measuring the Wavelength of Light

17.1 – Measuring the Wavelength of Light

22.1 – Investigating Current and Voltage Relationships

22.1 – Investigating Current and Voltage Relationships

22.2 – Investigating Resistance in Series and Parallel

22.2 – Investigating Resistance in Series and Parallel

22.3 – Investigating the Effect of Temperature on Resistance

22.3 – Investigating the Effect of Temperature on Resistance

23.1 – Investigating Current and Voltage in a Filament Lamp

23.1 – Investigating Current and Voltage in a Filament Lamp

24.1 – Investigating Current and Voltage in a Semiconductor Diode

24.1 – Investigating Current and Voltage in a Semiconductor Diode

Explore Leaving Cert Physics Exam Questions by Topics

3.1 – Calculations of Refraction of Light

3.1 – Calculations of Refraction of Light

3.2 – Measuring the Critical Angle and Refractive Index

3.2 – Measuring the Critical Angle and Refractive Index

4.1 – Verifying the Lens Equation

4.1 – Verifying the Lens Equation

5.1 – Investigating Constant Velocity Using a Trolley or Rider

5.1 – Investigating Constant Velocity Using a Trolley or Rider

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.2 – Determining Acceleration Due to Gravity

6.2 – Determining Acceleration Due to Gravity

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

7.1 – Verifying the Law of Vector Addition

7.1 – Verifying the Law of Vector Addition

Show more

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.1 – Investigating Accelerated Motion Using a Trolley or Rider

6.2 – Determining Acceleration Due to Gravity

6.2 – Determining Acceleration Due to Gravity

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

6.3 – Determining Acceleration Due to Gravity Using a Simple Pendulum

7.1 – Verifying the Law of Vector Addition

7.1 – Verifying the Law of Vector Addition

8.1 – Investigating Force, Mass and Acceleration Relationships

8.1 – Investigating Force, Mass and Acceleration Relationships

8.2 – Investigating Conservation of Momentum

8.2 – Investigating Conservation of Momentum

9.1 – Determining Acceleration Due to Gravity

9.1 – Determining Acceleration Due to Gravity

10.1 – Investigating Conservation of Energy on a Ramp

10.1 – Investigating Conservation of Energy on a Ramp

12.1 – Investigating Work and Energy in Stretching or Compression

12.1 – Investigating Work and Energy in Stretching or Compression

12.2 – Verifying Hooke’s Law

12.2 – Verifying Hooke’s Law

13.1 – Investigating Alcohol as a Thermometer Liquid

13.1 – Investigating Alcohol as a Thermometer Liquid

14.1 – Determining the Specific Heat Capacity of a Liquid

14.1 – Determining the Specific Heat Capacity of a Liquid

14.2 – Determining the Latent Heat of Fusion and Vaporisation

14.2 – Determining the Latent Heat of Fusion and Vaporisation

16.1 – Verifying the Stretching of a Spring (Tension Model)

16.1 – Verifying the Stretching of a Spring (Tension Model)

17.1 – Measuring the Wavelength of Light

17.1 – Measuring the Wavelength of Light

22.1 – Investigating Current and Voltage Relationships

22.1 – Investigating Current and Voltage Relationships

22.2 – Investigating Resistance in Series and Parallel

22.2 – Investigating Resistance in Series and Parallel

22.3 – Investigating the Effect of Temperature on Resistance

22.3 – Investigating the Effect of Temperature on Resistance

23.1 – Investigating Current and Voltage in a Filament Lamp

23.1 – Investigating Current and Voltage in a Filament Lamp

24.1 – Investigating Current and Voltage in a Semiconductor Diode

24.1 – Investigating Current and Voltage in a Semiconductor Diode

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