Resistnace

What is resistance?

Is anything in a circuit that slows the flow down of electrons (the current)

Planning

Introduction

Resistance is anything in the circuit that slows down the current (The flow of electrons.) If you increase the resistance then less current will flow. A variable resistor alters the current flowing through the circuit depending on what you alter it to.

- ve +ve

Voltage supply provides the push

Current Flows

Resistance opposes the flow

Revision Guide for GCSE Physics.

This diagram shows the affect of resistance.

The above equation is ohms law. It is used to measure, current, voltage and resistance.

It is possible to use the following circuit to measure the resistance of a wire.

It is then possible to use OHMs law to find out the current by dividing the voltage by the resistance. You could change the length of the wire to see different results. I will do a similar experiment for my investigation.

Factors How the factor will affect the resistance

Materials (type of metal) Whether there good conductors or not. Whether it's heat resistance.

Voltage The more voltage there is the more push there is against resistance

Other components Will add to resistance

Temperature The higher the temperature