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# Chapter 10: Electric circuits

## 10.1 Introduction (ESCPS)

The study of electrical circuits is essential to understanding the technology that uses electricity in the real-world. In this chapter we will focus on revising content from Grade 11 and extending our understanding of the internal structure of a battery/cell and how this influences what you already know about circuits.

• Units and unit conversions- Physical Sciences, Grade 10, Science skills
• Circuit components- Physical Sciences, Grade 10, Electric circuits
• Ohm's law - Physical Sciences, Grade 11, Electric circuits
• Series and parallel components - Physical Sciences, Grade 11, Electric circuits
• Equations - Mathematics, Grade 10, Equations and inequalities

Series and parallel networks of resistors:

• Understanding of Ohm's Law.
• The meaning of conservation of charge and energy for different types of circuits.
• Calculations done using series and parallel circuits.
• Solve problems involving current, voltage and resistance for circuits.

Batteries and internal resistance:

• State that a real battery has internal resistance.
• Do experiments of finding the internal resistance of a battery.
• Do calculations by using circuits with batteries with internal resistance.

Evaluating internal resistance in circuits:

• Solve circuit problems using batteries with internal resistance with series, parallel and series-parallel circuits.

Extension: Wheatstone Bridge:

• Definition of a Wheatstone Bridge.
• Solve problems concerning the Wheatstone Bridge.
• Units and unit conversions- Physical Sciences, Grade 10, Science skills
• Circuit components- Physical Sciences, Grade 10, Electric circuits
• Ohm's law - Physical Sciences, Grade 11, Electric circuits
• Series and parallel components - Physical Sciences, Grade 11, Electric circuits
• Equations - Mathematics, Grade 10, Equations and inequalities
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