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

How to produce an electric current?

Extracts from this document...



How to produce an electric current?

I f you take a magnet and move it in to a coil of wire the voltage has been induced to a smaller voltage to induce it to a bigger voltage you move the magnet out of the coil in the opposite direction. In a generator, a magnet rotates inside a coil of wire. This includes a current if the coil is connected to a complete circuit. Otherwise it will induce the voltage and not the current. Things you can use to create a greater current is to use

  • A stronger magnet.
  • Create more turns on the coil of wire.
  • Increase the area of the coil.

How to make a current flow?

...read more.


2 Constantan wires 1m length


1.      Arrange apparatus as shown in the Diagram:

2.      Organize wires to the following lengths:











3.      Attach the wire to the crocodile-clip leads and set voltage to 5 volts or 1.5 Volts

4.      Take the reading from the ammeter and record in results table.

5.      Repeat 3 times for each length of wire and find the average.

6.      Then work out the resistance using the formula V÷I=R

(Voltage ÷ Current = Resistance)


We carried out a preliminary experiment to see the other factors that could affect the experiment and also to see if we could improve any of the steps in the method. This showed that the wire was

...read more.


yle="width:36px;height:36px;margin-left:0px;margin-top:0px;" alt="image08.png" />





...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 resistance would have been caused to be greater due to small kinks in the wire which I did not notice. During the experiment, temperature of the surroundings could not be kept constant, this factor affects the results greatly, as the temperature increases the metal ions vibrate more leading

  2. resistivity if a nichrome wire

    m 12.3% Sources of likely error Systematic errors and random errors: Sources of likely error Effect to the investigation To minimise errors Heating of the wire Heating due to the power can result in the electrons in the wire gaining more kinetic energy and therefore vibrating more.

  1. Investigation into the resistance of a filament lamp.

    11.71 8.50 1.52 12.89 9.00 1.56 14.07 9.50 1.60 15.17 10.0 1.63 16.27 10.5 1.71 17.96 11.0 1.75 19.25 11.5 1.79 20.62 12.0 1.88 22.60 Voltage(volts) Temperature (Celsius) Temperature (Kelvin) 0.50 125� C 398 1.00 250� C 523 1.50 375� C 648 2.00 500� C 773 2.50 650� C 923

  2. Investigating how temperature affects the resistance in a wire

    I have used the treadline as a basis for this conclusion because the results have a weak correlation, and the linear treadline is therefore nearer to the theoretical result. However, the weakness of this negative correlation raises the notion that the results have no correlation at all.

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

    As with the length experiment, this prediction can also be explained using the model which I have called the electricity model. This time if you double the cross-sectional area of the putty you double the number of paths that the electrons can take so you double the number of electrons

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

    Overall Observation from Theoretical Modelling From my findings above I know that in Circuit Two, the resistance value will always be 40? off the resistance value, which is labelled on the resistor in the first place. I plotted a graph (on the next page)

  1. The electric circuitry of the average car.

    Once the engine starts, the alternator can provide the power that the car needs. Therefore, a car battery can last a number of years. As shown in the diagram on the next page, a 12-volt car battery consists of layers of positively and negatively charged lead plates.

  2. AC Generator

    fast, it could cause a short circuit or destroy the whole project. Keep the hand drill on a safe speed . Testing and Modifications: * The way I placed the magnets failed to get the generator producing current so I had to get more magnets and place them around the whole armature.

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