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

The aim of this investigation is to investigate the relationship between current and voltage for a range of components

Extracts from this document...



Physics Coursework (Resistance of a wire, Insulation)       Ms. Besford

AIM: The aim of this investigation is to investigate the relationship between current and voltage for a range of components


The key variables of this experiment are current and voltage.

Current is a flow of electrons. In a series circuit the current is the same everywhere. Ammeter is used to measure current. For electrons to flow a complete circuit is needed. In a parallel circuit the current is split between the branches. Amps (A) is the unit of current.

...read more.


        0-1 A

        0-5 V

Resistance is anything in the circuit, which slows down the flow of current. Resistance makes it more difficult for the current (electrons) to flow. High resistance means that the current gets lower. High temperature means less resistance (big current) and low temperature means high resistance (small current) E.g. When the car is driving along the track, if there are too many humps the car will slow down where as if

...read more.


        Voltage supply provides         Current

        The push.         flows

        Resistance – opposes the flow        

As current passes through resistance the resistor will get hot this is because electrical energy is changed into heat energy. The more current that flows more heat is produced. The higher the resistance means less heat is produced. This is because big resistance means less current flows through and less heat is produced. High voltage means more heating, this is because it pushes more current.


...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. The aim of my investigation is to determine the specific heat capacity of aluminium.

    * Connect circuit as shown in the diagram above. * Record the initial temperature, current and voltage at time zero as soon as the power pack is switched on. * Record the temperature, current and voltage every minute for the required length of time. I decided to perform the experiment three times so I would have repeated sets of results, which I could compare.

  2. Relationship between the current and voltage.

    As stated above, the only independent variable will be the potential difference off the circuit. This will be controlled using a potentiometer. The resistance of the components will be a constant, except for the light bulb. As this will light up, the resistance will also vary.

  1. Investigating how temperature affects the resistance in a wire

    This will also show how accurate my results are because it will show how close to the actual value for the temperature coefficient of resistance my estimate was. Here is a list of some of the temperature coefficients of resistance for metals.

  2. A2 Viscosity investigation

    as this would be unpractical and in the time period it wasn't feasible to do so. Also by the time a ball bearing had reached the bottom the temperature would have decreased thus making the test highly unfair. To try and counter this the temperature used at the stat was

  1. The aim of the experiment is to verify the maximum power theorem and investigate ...

    = 0.895 m2= ( 5.5 - 3.55) / (8.0 - 4.88) = 0.625 ?m = [(0.895 - 0.727) + (0.625 - 0.727)] /2 = 0.033 The value of coefficient of static friction �s: 0.727 � 0.033 The maximum error in the value of coefficient of static friction �s: 0.727 � 0.033 Maximum percentage error in the value

  2. physics sensor coursework

    �10^-3] Min value = 11 816.14 ? Error max = (313.11/ 12 526.07) �100 Error max = 2.50% Error min = (396.82/ 11816.14) �100 Error min = 3.36% At 100 lux: Max value = Max V/ Min I Max value = (9.82 + 0.005)/ [(7.68 - 0.005)

  1. To find which of the circuits, shown below, are most suitable to measure a ...

    I have actually plotted a graph of labelled resistance against the resistance obtained by the calculations above (graph on next page) and this is a curve. This shows that as the resistances become bigger, the value that Circuit One obtains due to the meter readings will become even further from the labelled resistance values.

  2. A coursework on sensing temperature with voltage.

    Creativity: It should be creative, experimental, spontaneous even! These factors were taken into consideration in creating this temperature system. The result is a reasonably balanced system with adequate resolution, very high sensitivity and appropriate range, little random error (which is almost totally wiped out by the graph and averaging a set of readings), analyzed and understandable data, and

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