... time the same so then I will only be varying one factor that affects current/temperature. Values I will keep constant: Voltage - 6V, Mass of Water - 30g, Time - 15 minutes. Variables I will change: Resistance - from 3 ohms to ...

... 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. ...

... resistor in it, the diagram contains: Power Pack Fixed resistor Variable resistor (rheostat) Voltmeter Ammeter This is the second diagram of the second test, this has the filament light bulb in, this contains: Power pack Filament light bulb Voltmeter Ammeter ...

... To make it a fair test I will use the same equipment, keep everything the same, apart from the varying factor. I will also keep the magnet at the same height, this is so that the Gravitational Potential Energy (GPE) ...

... as the wire may get too hot and burn the surface where I am working on or just catch alight itself. Also, as there are only three types of wires (constantan, nickel chrome and copper), it would not be ideal to ...

... This current, together with the cell's voltage (which is a result of the built-in electric field or fields), defines the power that the solar cell can produce. Photovoltaic cells have a positive and a negative layer. The positive layer is made ...

... pipe the same can be said about the wire except the wires "friction" is the result of electronics colliding with the vibrating atoms of the wire. Other variables include thickness of wire, which is a variable as it increases the surface ...

... have the property of which they cannot be taken away or added to other protons in any other atoms and therefore the number of protons in an atom will always stay the same within an atom. Neutron One of ...

... the distance in the putty that the electricity has to travel, the larger the resistance, if the distance in the putty is smaller, the resistance will also be smaller. It is possible for electricity to move through the putty, as the ...

... at the anode Cu = Cu2+ + 2e-. Prediction I predict that in this experiment, when the current is high the amount of copper deposited will be higher that with a small current. This is because the higher the ...

... preliminary experiment using the above circuit, to test that my method actually worked and to find out the range of voltages that the power pack could produce. My results for this are listed on the following page. Preliminary Results VOLTAGE (volts) CURRENT ...

... 0.5V each time, starting at 0V and finishing and 6V. * To record the current after each voltage change. Readings shall be extremely accurate, as they are taken in Milliamps (a thousandth of an Amp). * To repeat the experiment twice to ...

... I go to set up all the equipment, than I will to connect what to what. After drawing the circuit I gathered all the apparatus that I need for this experiment. After setting them what I will have to do ...

... I will take my readings from the ammeter to give me the current readings and from the volt meter to get the voltage. I will do this 3 times for each temperature so I can work out an average to ...

... supplies for a wide range of electrical equipment. * Liquid level sensor The equation used for calculation of the resistance of the thermistor is: Resistance = ( R= ) Prediction After research of this science I have found that the thermistor is made ...

... the examples but there are many more ways of making a current flow. After that you press the switch and the current shall run through the switch. How to measure a voltage? To measure a voltage you have to use a voltmeter. ...

... the examples but there are many more ways of making a current flow. After that you press the switch and the current shall run through the switch. How to measure a voltage? To measure a voltage you have to use a voltmeter. ...

... cells are used to generate environmentally friendly electricity for example a calculator that doesn't have batteries has one. I am going to use the LDR as it is easily available and has a reasonable degree of accuracy. As I said earlier the ...

... is made bigger, the ball will roll towards the other side. The more the potential on one side is increased, the faster the ball will roll to the other side. There are some variables I will have to keep constant throughout ...

... above (a straight line). This means that current is directly proportional to the voltage. The gradient of the graph is also the resistance of the pencil lead. The gradient will then be taken along with the cross-sectional area and the ...

... attempt 2nd attempt 3rd attempt Mean, µ Standard deviation, ? 0 90.40 90.30 90.40 90.36 0.06 5 74.80 74.70 74.90 74.80 0.10 10 56.70 56.60 56.70 56.67 0.06 15 45.30 45.20 42.50 45.23 0.06 20 36.50 36.50 36.50 36.50 0.00 25 29.60 29.80 29.70 29.70 0.10 30 23.70 24.00 24.10 23.93 0.21 35 19.80 19.70 19.90 19.80 0.10 40 16.10 16.30 16.30 16.23 0.12 These results were taken using a power supply of e.m.f. 2.00V and the variable resistor at 1M? Experiment 3 Potential difference across thermistor (mV) Temperature of thermistor (ºC) 1st attempt 2nd attempt 3rd attempt Mean, µ Standard deviation, ? 0 48.60 48.80 48.50 48.63 0.15 5 36.30 36.30 36.10 36.23 0.11 10 28.80 28.70 28.80 28.76 0.06 15 22.90 22.90 23.00 22.93 0.06 20 18.40 14.40 18.30 18.36 0.06 25 14.90 15.00 15.10 15.00 0.10 30 12.10 11.90 11.70 11.90 0.20 35 9.90 9.80 9.60 9.76 0.15 40 8.10 8.20 8.10 8.13 0.06 These results were ...

... LDR (Light Dependent Resistor). This is a light detecting sensor in which can be set up simply in a circuit, to explore a characteristic of its properties. I have chosen this sensor as I think it can be used in ...

... in steps of 0.5A and thus I will start at 10A, 9.5A, 9A etc until 7A I will measure the current on an analogue meter accurate to 100th of an amp. I have chosen to work with this degree of accuracy ...

... by a huge amount this does have an affect. Density Density has a large affect on the amount of resistance. The resistance depends upon the amount of denseness e.g. a large surface area has less resistance because a small area has tightly ...

... graph, because the first line I drew didn't go through all the points but it did go through (0,0) whereas the second line went straight through three points, which were points two, three and four. The reason that the first ...