1. Hydraulic analogy of electricity
Unit 2.Lesson 1

2. The hydraulic analogy Purpose
To use a water circuit where drops transport energy as a explanation of how an electrical circuit transports energy by moving electrons.
Cast of characters
A drop of water as the electron
The water pressure (pressió de l’aigua o altura) as the voltage or potential difference.
The water flow (cabal d’aigua) as the intensity of the electricity current
The pipe obstruction (resistència de les canonades) as the resistance of electricity components in the circuit

3. Difference of potential
Voltage equivalence
Small
Big
Waterfall
Water pressure
(pressió)
High
Low
Voltage or
Difference of potential
Torch and batteries

4. Introduction to Circuit Analysis - Water Analogy
Voltage equivalence
Introduction to Circuit Analysis - Water Analogy

5. Intensity equivalence
Water flow
(cabal)
Little
Big
Intensity

6. Resistance equivalence
Small
Big
Water obstruction
High
Low
Electric resistance

7. Ohm’s law

8. Ohm’s law Voltage (V)= Intensity(A) x Resistance (Ω) Hydraulic analogy
Electric
magnitude
symbol
unit
Pressure
Flow
Obstruction
Voltage V
Volts (V)
Intensity I
Amperes (A)
Resistance R
Ohms (Ω)
Voltage (V)= Intensity(A) x Resistance (Ω)