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

What are Diodes?

Extracts from this document...


Sam Newman 10E


The Symbol for a basic diode is:        image01.pngimage01.png


...read more.



A diode is an electronic device that permits current flow  in only one direction. Most diodes are semiconductors.

A diode has a low resistance to electric current in one direction and a high resistance to it in the reverse direction. This makes a diode useful as a rectifier, which can convert alternating current (AC) into direct current (DC).

A diode using this property is called a Zener diode. It

...read more.


Also a perfect diode would turn on the instant that any voltage is applied not 0.6v as the diodes we have at the moment turn on.

If they turned on and off as I have said above they would be much more efficient and more useful for the person using them.

I think that that as technology advances in the future diodes will get closer to being a perfect diode.

Diodes - page  of

...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 Capacitance of a Parallel-Plate.

    5.8 V as displayed by the voltmeter. The two plates are fully overlapped. We compare the differences on the current without a dielectric (I0) and with a dielectric (I). Results: I0: 0.94 I: 1.52 As 1.62 Possible percentage error = = 1.72% Possible absolute error = = 0.0279 We could then verify that a dielectric substance is able to increase the permittivity.

  2. Using an LDR to detect the intensity of plane polarised light allowed through a ...

    found the following formulae: The former is a formula, from what I can gather, used to predict the intensity of an electric field passed through a polaroid. The latter, dealing with the intensity of the light, is what I require.

  1. Choosing a light source

    They will also reduce the electric bill because they use only 20 to 30% as much energy as incandescent bulbs for the same amount of light. Fluorescents are most cost effective and efficient in areas where lights are on for long periods of time.

  2. Is polymer electronics the future of TV screens

    polymers, which mean that they consist of large molecules with long repeating chains of smaller organic units. Depending on the structure of the materials, they are electrically insulating, conducting or semiconducting. Special polymers, such as conductive polyacetylene, consist of many identical single units, or monomers, combined in a chain.

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