• 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. Relationship between the current and voltage.

    This is seen on the graph after the 12. 5 ohm point, which shows the graph becoming horizontal. Evaluation: This experiment was carried out extremely fairly. We had a suitable and very effective method, which managed me to receive sufficient fair results.

  2. In this experiment I intend to find out what affect the amount of turns ...

    Safety Precautions There are many obvious safety precautions to be taken: * Do not allow any water near the experiment * Do not touch any bare wire while there is a current passing through the wire * Do not plug lab pack into a socket, which is on * Certainly

  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

    RESULTS Distance of Magnets from Armature (cm) Current reading on Galvanometer (A) 3 (default) 3 8 (further) 1 1 (closer) 5 Velocity of the Hand Drill Current reading on Galvanometer (A) Medium (default) 3 Faster 5 Slower 1.5 Risk Assessments Procedure * Be careful not to spin the axel too

  1. Physics - How Electric Eels Generate and Use Electricity.

    In a fully grown electric eel sex thousand cells could be stacked to make one large battery that can be competent to generate as much as 600 volts for one short pulse. If you compare this to a normal car battery which generates a mere 12 volts, you can see

  2. resistivity if a nichrome wire

    the power pack was turned off, the temperature of the wire may have not reached the initial temperature (room temperature) and would therefore the electrons would have had more kinetic energy and this will vary the resistance. In future, I was to carry this investigation again I would wait for

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

    0.0003 14666.7 22000 4.1 0.0002 20500.0 33000 3.2 0.0001 32000.0 47000 5 0.0001 50000.0 The first column of this table shows the resistance that was labelled on the actual resistor. The second and third columns are the actual resistance values in the two experiments that I undertook.

  2. Investigating how temperature affects the resistance in a wire

    Graph 3 and 4 show that in general the accuracy of the result increases with an increase in the temperature, and that at low temperatures the results are not very accurate at all. I can conclude this as, the bigger the standard deviation or range the less accurate the results are.

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