V= IR Activity

Voltmeters, Breadboards, Resistors and Batteries

You’re turn to do some experiments!

Now you get to try some experiments of your own, but first, a quick tutorial on the equipment you will be using

The equipment you’ll be using:

- Voltmeter - Breadboard - Resistors - 9V battery

Let’s do a quick review…

How to use a voltmeter:

Voltmeter: - connect either end of the meter to each side of the

load

If you are reading a negative value, you have the probes switched.

There should be no continuity beeping. If you hear beeping, STOP what you are doing and ask someone for help!

Voltmeter

Voltage:

Probes connect to either side of the resistor

Measuring Voltage

Breadboards• You encountered breadboards early in the

year. Let’s review them:

The breadboard

How the holes on the top of the board are connected:

Series

Resistors are connected such that the current can only take one path

Parallel

Resistors are connected such that the current can take multiple paths

Real dataReal data

In reality, the data we get is not the same as what we get in theory.

Why?

Because when we calculate numbers in theory, we are dealing with an ideal system. In reality there are sources of error in every aspect, which make our numbers imperfect.

Now go have fun!