• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Heating effects of a current

Extracts from this document...

Introduction

Heating effects of a current

Aim- My aim is to see how the increase and decrease of the current effects the temperature of the water

Equipment List-    

  • Wires
  • Beaker
  • Water
  • Variable Resistor
  • Power Pack
  • Ammeter
  • Crocodile Clips
  • Thermometer
  • Goggles

Fair Test- I will use an equal quantity of water each time. I will make sure the equipment is working properly. I will start the experiment at the same temperature every time.

Pre Test- I am going to do a pre test to decide what voltage to use in the experiment. I will try 4 volts, 6 volts, 8 volts and 10 volts. The voltage was most effective at 10 volts because that’s were the temperature rose the most.

Method- I will gather the equipment on my list. Connect the equipment together making sure it is set up in parallel. I will fill the beaker with a 100ml of water and put the wire into it. I will then switch on the experiment. I will note down the starting temperature and the amp reading. I will then finish after 10 minutes, noting down the temperature. I will then figure out the temperature change. Then I will strengthen the variable resistor and do the procedure. I will do the experiment with the variable resistor at 5 different levels.

...read more.

Middle

1.4

22

24

2

1.6

22

26

3

1.8

22

27

5

2.0

22

29

7

Current (amps)

Starting Temperature(°C)

Finishing Temperature(°C)

Overall temperature Change(°C)

1.2

22

23

1

1.4

22

24

2

1.6

22

24

2

1.8

22

25

3

2.0

22

27

5

Average results

Current (amps)

Starting Temperature(°C)

Finishing Temperature(

...read more.

Conclusion

°C, apart from when I got to 2.0 amps were it rose by 2°C, that is my only anomaly but it is only a small one. I think the procedure proved the point I was trying to make. Although it would have worked better if we had a higher voltage because the current would have been higher and therefore the electrodes would collide more and create more heat. This would therefore show me if it was definitely the current in the wire that was heating the water because it would have been a more major temperature rise. The problem with the way we did it was that the current wasn’t that high so the temperature only rose a couple of degrees and that could have been to do with some other form of heating e.g. the room temperature rising or it being in sunlight. Further work I could provide to provide additional relevant evidence is to get a more powerful power pack and do the same experiment but at a higher voltage therefore making the current higher. This could show me if it is actually the wire heating the water and not another form of heat. Also it would show me if the temperature continued to rise in the same way in comparison to the current as it does in my graph or if it rises less or more.

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Electrical & Thermal Physics section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Electrical & Thermal Physics essays

  1. Investigating the effect of 'length' on the resistance of a wire

    * The crocodile clips may not have been placed on the exact point for the length required. The length could have been greater or less than the required length, giving a higher or lower resistance. * Analogue voltmeters and ammeters do not give a high degree of accuracy due to manmade reading errors.

  2. resistivity if a nichrome wire

    = gradient x area ? = (16.2 ? m-1 ) X (7.07 x 10 -8 m) = 115 x 10 -8 ? m The real resistivity of nichrome wire is: 110 � 10-8 ? m My value for the resistivity of the nichrome wire is 116 x 10 -8 ?

  1. The Effects of Temperature on Resistance.

    The Voltmeter: As with the ammeter this too has an internal resistance, but because of the negligible size I will discount it. The Wiring: As there is relatively little wiring and the voltage and current will be low I can assume there will be very little/no heating effect and therefore

  2. Investigating how temperature affects the resistance in a wire

    are the output variables. The voltage and the ampage is used to calculate the resistance, since this is a variable, which I do not control in the experiment, it is therefore a dependent variable. Control variables - Some variables can affect the results of the experiment out of proportion, if

  1. Investigating the factors affecting the size of current flowing through a length of resistivity ...

    The copper plates were cleaned with emery paper before they were placed against the putty. 2. I inserted the plates at right angles to the putty and gently pushed the two pieces of putty together to try to ensure that good contact was made without changing the shape of the putty.

  2. Factors Affecting The Heating Effect Of A Current.

    of V, the rate of heat production by a resistor increases as R decreases. Now R = pl/A, therefore P = V�A/pl and so where a high rate of heat production at constant p.d. is required, as in an electric fire on the mains, the heating element should have a

  1. Find out whether a longer wire or a shorter wire will have more or ...

    Copper Wire Rubber Wire PREDICTION In my prediction I predict that the longer the wire the higher the resistance. The current will also be lower. However the lower the resistance the higher the current will be present in the wire.

  2. To see the effect of volume current on the effectiveness of an immersion heater ...

    Evaluation In my view, the experiment went well. It showed what it was meant to show. However, there were a few anomalies. For example, the temperature differed by more (10oC) when the current reading was 1.76A than when the current reading was 2.51A.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work