Electric Heater Investigation

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Recommended: Measurement of voltage and current

Electric Heater Investigation

Introduction

I am going to conduct an experiment which will provide with evidence

to show that if voltage is increased in an experiment the amount of

heat energy produced is also increased.

Key Variables

The items that might affect my test results are: -

* The thickness of the resistance wire

* The length of the resistance wire

* The thickness of the tube

* The temperature of the water used

* How many times the resistance wire is wrapped around the tube?

* The amount of current, voltage or energy provided

* The place in the test tube that you take your temperature is taken

from

Prediction

I predict that as I increase the voltage the temperature will increase

depending on the amount of volts that are provided to the heater. The

evidence that I am going to prove my prediction is listed below. The

electrical equation that I am going to use to prove my prediction is:

-

Power=Voltage x Current

P=VI

So….

4Vx 2A=8W this basically means that if you multiply a voltage of 4

and a current of 2A you will get a result of 8W.

But….

12Vx2A=24W this basically means that if you increase the voltage to

12V and leave the current the same the amount of energy produced will

also increase.

The equations above prove that if you increase the voltage the amount

of energy that is produced will also increase.

Equipment needed

The equipment that I will require in this experiment : -

* 1m of resistance wire

* Test tube

* Beaker

* Glass rod/tube

* Stopwatch

* Power supply

* Ammeter

* Electrical wires

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