Electric Circuits 19

19.1 Introduction ESBIE

The study of electrical circuits is essential to understand the technology that uses electricity in the

real-world. This includes electricity being usedfor the operation of electronic devices like computers.

See introductory video:VPmbu at http://www.everythingscience.co.za

19.2 Ohm’s Law

ESBIF

Definition of Ohm’s Law ESBIG

General experiment: Ohm’s Law

Aim: In this experiment wewill look at the relationship between the currentgoing through a

resistor and the potential difference (voltage) across the same resistor.

A

V

Method:

1. Set up the circuit according to the circuit diagram, starting with just one cell.


2. Draw the following table in your lab book.

Voltage, V (V) Current, I (A)

1,5

3,0

4,5

6,0