29 results found for electricity

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00:30:00

Ion Channels: Their Discovery, their Function and their Role in Diseases

by Erwin Neher
Ion Channels: Their Discovery, their Function and their Role in Diseases
for 18-22 and upwards,
Lectures | 18-22 and upwards | 4 years ago | 752 views
Rating:

The concept of bioelectricity emerged in the late 18th century, based on the experiments of Galvani and Volta. Sixty years ago, Hodgkin and Huxley showed that the nerve impulse is a result of permeability changes of the nerve membrane. This raised th....

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00:06:00

The Magic of Science 1: Static Electricity

by Philip Schlenoff
The Magic of Science 1: Static Electricity
for All ages,
Teaching modules | All ages | 5 years ago | 1099 views
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00:03:00

How does a transistor work?

by Jonathan Hare
How does a transistor work?
for 11-14 and upwards,
Lectures | 11-14 and upwards | 6 years ago | 1679 views
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A short video explaining how transistors work.  At the heart of our high-tech society with radios, mobile phones, computers and space exploration are tiny electronic components called transistors.  They have revolutionised electronics and in the pr....

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00:06:00

Solar Cells

by Jonathan Hare
Solar Cells
for 11-14 and upwards,
Lectures | 11-14 and upwards | 6 years ago | 5349 views
Rating:

A short video on solar cells explaining with accompanying information sheet. How they work and how Jonathan uses solar power at home.

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00:06:00

Simple Electrical Generator

by Jonathan Hare
Simple Electrical Generator
for 11-14 and upwards,
Lectures | 11-14 and upwards | 6 years ago | 998 views
Rating:

With some simple circuitry and a homemade hand powered generator Jonathan makes AC and DC electricity that could be used for charging a mobile phone or attaching to a wind turbine.

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00:09:00

Paper Windmills

by Jonathan Hare
Paper Windmills
for 11-14 and upwards,
Lectures | 11-14 and upwards | 6 years ago | 2618 views
Rating:

Jonathan makes some simple paper windmills/turbines and experiments with a simple generator to power house hold devices such as torches, calculators and even a radio.

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00:04:00

Mobile Phone

by Jonathan Hare
Mobile Phone
for 11-14 and upwards,
Lectures | 11-14 and upwards | 6 years ago | 1118 views
Rating:

Jonathan shows us with a cheap and simple homemade demonstration how your mobile telephone generates radio waves in order for you to use it to communicate.  As you will see you can use this method to explore many aspects of your mobile phone!

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00:04:00

Electrical Generator

by Jonathan Hare
Electrical Generator
for 11-14 and upwards,
Lectures | 11-14 and upwards | 6 years ago | 949 views
Rating:

This short video shows one of the demonstrations for the Physics SEPNet exhibition - "Who will keep the lights on?" which travelled around the southern UK from February 2009.  We describe and explain the electrical generator demonstration which Jona....

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00:05:00

The Fresnel Lens

by Jonathan Hare
The Fresnel Lens
for 14-19 and upwards,
Lectures | 14-19 and upwards | 6 years ago | 839 views
Rating:

Early lighthouses used coil and wood fires before moving on to gas and then electricity powered lights.  Massive improvements took place by using a lens system around the light.  The development of the Fresnel lens brought what we now regard as the....

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01:02:00

Developing new solar cells – cheaper, or more efficient?

by Neil Greenham
Developing new solar cells – cheaper, or more efficient?
for 14-19 and upwards,
Lectures | 14-19 and upwards | 6 years ago | 1021 views
Rating:

Using solar cells to convert sunlight to electricity is an attractive way to reduce carbon emissions, but solar cells are still too expensive to be installed on the scale required. The next generation of solar cells aim to solve this problem using st....

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01:01:00

Dark, clowdy and impertinent’ – Thomas Browne’s scientific language

by Claire Preston
Dark, clowdy and impertinent’ – Thomas Browne’s scientific language
for 14-19 and upwards,
Lectures | 14-19 and upwards | 7 years ago | 362 views
Rating:

Succulent, cretaceous, technology, parasitical, electricity . . . Scientific investigation in the seventeenth century generated new ideas, and scientists needed new words to express them. Experimentalists, observers, collectors, and technicians all c....

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01:00:00

Recharging the Planet

by Clare Grey
Recharging the Planet
for 14-19 and upwards,
Lectures | 14-19 and upwards | 7 years ago | 850 views
Rating:

Energy storage technologies such as fuel cells, batteries, electrolysis and super capacitors will need to be improved to enable better use of intermittent renewable electricity sources and the development of sustainable transport in the future.

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