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

Group 4 project

Extracts from this document...

Introduction

Electricity: Electrostatics: * Not moving charges. * Material like amber, when rubbed, can move small objects * The technical term is that the 'balloon' or likewise, is electrically charged * There are two types of charge: - positive - & negative * if we are looking at atoms, protons are positively charged and electrons are negatively charged * An object that is not charged is referred to as neutral. * A neutron has no charges * In most situations we don't look at atoms, we look at whole objects * If an object has more electrons that usual it will be negatively charged. * If it has less electrons, it will be positively charged. * In most cases we can use friction and rub electrons from one object to another to charge it. * It is important to note: - electrons do the moving, NOT protons - the charge doesn't last long due to interactions with air - it is not restricted to solids * electrostatic precipitation - in chimneys. Smoke and dust are ionized and stick to the metal plates in a chimney * the basic technique of charging small particles is how photocopiers work Charging an object * can be easy or hard depending on the conductivity of the object. ...read more.

Middle

* Electrons are very small. * The charge on one is 1.6 x 10-19 C. * So 1C is the amount of charge you get from 1/ 1.6 x 10-19. * IC is the charge on 6.25 x 1018 * Sometimes we don't use joules either, we use the electron-volt * 1eV is the energy an electron gets when made to move by a 1V potential. * 1eV = 1.6 x 10-19 J * i.e. an electron that accelerates through 1.5V will lose 1.5eV of potential energy but gain 1.5eV of kinetic energy. Precise Definition: The electric potential at a point in an electric field is the amount of work that would be done in bringing a positive test charge from infinity to that point. * Electric work: W = qV * The F here is Felec = kq1q2 / r2 * So Fr = (kq1q2 / r2) x r * = kq1q2 / r * and Fr = qV, so... * kq1q2 / r = qV * V = kq2 / r * Where 'r' is the distance between the two charges. CIRCUITS * Key concept: * Current = rate of flow of charge * Voltage = energy of charge * q = ?I ?t * for a circuit to work we need: - a path for the charge to travel along - a field to get the charge to move i.e. ...read more.

Conclusion

* Voltmeters have very large resistances so that they don't "steal" any of the current * Easy to kill ammeter, hard to kill voltmeter POWER * POWER = ENERGY / TIME * Measure in watts * Electrical energy = qV * q = It * therefore P = ItV / t = IV * P = IV * E = VIt The KiloWatt - hour * Electricity companies don't use joules to measure energy use. * 1kW-h = 1000 x 60 x 60 * = 3, 600, 000 * = 3.6MJ VOLTAGE dividers * voltage dividers are used in LOTs of places. From dimmer switches to sensor systems. Recall from our knowledge of parallel circuits R (?) R (?) RT (?) 100 100 50 100 10,000 99 100 1,000,000 99.99 The bigger one resistor is than the other, the closer the total resistance is to the lowest resistor. A voltage divider uses this property. To examine the circuit we just ignore the "something useful" part of the circuit --> ignore the bigger voltage. SENSORS * streetlights are a good example of the use of a voltage divider & sensor * a change in environment is what drives the sensor * e.g. colder = makes a heater more conductive Power shortcut P = VI V = IR P = IRI = I2R P = I2R P = VV / R P = V2 / R ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Group 4 Projects 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 International Baccalaureate Group 4 Projects essays

  1. Supply Chain Management for Kinley Project

    We will analyze the possibility through different point of view for your consideration. 3.1 Capacity and Knowledge As understood, your good company, Kinley, invests heavily in research and development and you have loyal engineering expertises to design innovative product and one step ahead of your competitor.

  2. Personal project - I have chosen Human Ingenuity as my Area of Interaction because ...

    I beat it), get someone either friend or family to watch me do it, and just go for it without thinking about the pain in my lips from the hundreds of straws stretching my lips. Throughout the process of this I had to learn to understand the connection between these

  1. Determine the presence of reducing sugar, protein and starch in the food products by ...

    light green light blue light blue sucrose N/A N/A N/A N/A N/A N/A N/A N/A glucose yellow yellow greyish blue greyish blue orange orange Beige/yellow + caramel- coulored solid N/A lipid N/A N/A N/A N/A N/A N/A N/A N/A From the table above, the color change of different substances as the chemicals for the specific test were added.

  2. Research Report Time management strategies among HKU SPACE Community College students".

    The reason may be the different attitudes of planning. Males may feel relax after finishing a task in their plan when the females still concern about other tasks. Therefore, females were less frequently to feel having too much time than males.

  1. Group 4 Journal. Our process was an industrial one called Aquaponics. Aquaponics is ...

    Impellers contained within the body of the pump start turning. The rotation of the impellers sucks water into the body of the pump. The impellers then push the water out of the pump and up through the pipe to the water tank.

  2. Research Project. Social networks: How they influenced business and employment

    Through these networks promoting their products has become easier and they can also get quick feedback and customer suggestions. Finding the right person or a business for a job that needs to be done is no more a lengthy process.

  1. Designing a series of modern fashion accessories design collection with the theme of combining ...

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2. Presentation . . . . . . . . . .

  2. Social Science Final Project- How have the events and issues of the 60s impacted ...

    My oldest brother was drafted for the Vietnam War. He had been gone for about two days when early one Saturday morning he came knocking on the door explaining to us that he couldn't go to war because of a heart condition.

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