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To investigate one factor that affects the heating of water.

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Introduction

The Electrical Heating of Water Aim To investigate one factor that affects the heating of water. Factors that affect the heating of water > Heat given off in steam > Heat given off by conduction, radiation and convection > Amount of water > Type of container > Voltage > Resistance > Power > Size and shape of heating element Preliminary work Insert preliminary work here. I am going to investigate how the power in a circuit affects how quickly the water heats to a certain temperature. Prediction I think that if I increase the power into the heating element, it will give off more power into the water, heating it up faster. I know that to increase the power the voltage must also be increased. As the voltage rises, the current will also rise because the two factors are linked. I know that increasing the voltage will result in increased power because of the formula; P=IV. In this formula, P stands for power, I stands for current and V stands for Voltage. ...read more.

Middle

Plan In my experiment, I plan to investigate the power in a circuit and whether it is proportional to the time taken to heat the water. The factor from the list on page 1 that I will change is the power. As I explained in my prediction, I shall do this by altering the voltage. The current will also change, but only because it is proportional to the voltage. All the other factors that could affect my experiment, I will keep the same. I will use an Ammeter to measure the current and a voltmeter to measure the voltage in the circuit. By measuring these, I can use the values in any relevant formulas. I will measure the temperature of the water at the start and at the end of the experiment. I will also weigh the water and the beaker it is in on a top-pan balance both before and after heating it up. ...read more.

Conclusion

this will also illiminate (how do you spell this word? The spell checker doesn't like it!) any irregularities in the start temperature of the water. In my preliminary wok, I found that it took a long time to heat 100ml of water to 60?C. Because of this, I need to use as little water as possible because it will heat faster, and aim to get the water to only rise 20?C. Both of these factors will ensure that I don't have to wait a long time to heat the water when using a very low voltage. I aim to get ... readings at each of the ... voltages, ranging from ...V to ...V. fill in blue sections, talk to Amy about what to fill them in with. I am going to heat the water using an electrical heating element. The heating element looks like this: In a circuit, the heating element's symbol is: draw symbol. The circuit I plan to set up, containing the heating element, to heat the water looks like this: Draw circuit diagram 1 1 ...read more.

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