science brouchur solangel noven 9th.docx

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1. Motion from Electricity
Electricity and magnetism are
fundamentally related: both are
manifestations of the electromagnetic
force, one of the four forces of nature.
Because of this close relationship,
electricity can produce magnetism
electricity. This principle is very
important in the harnessing of
electricity for man’s use.
Solenoids:
One simple device that converts
electricity to back-and-forth motion is
the solenoids, which in its simplest
form is a wire coil with an iron bar
free to slide back and forth.
Telegraphs and relays:
In 1837, American artist and inventor
Samuel Morse patented a device for
communicating over long distances
by means of electromagnet. Morse’s
device, called a telegraph.
The Electric Motor
Although solenoids, relays, and
devices are very useful, by far the
most important device for converting
electricity into motion is the electric
motor. Electric motors are used in
everything from hair dryers and
electric shavers o giant cranes and
large ships; they range from
microscopic motors smaller than the
width of a human hair to units
weighing many tons. The idea of an
electric motor originated from Pierre
le Pelerin’s theory of a perpetual
motion wheel operated by magnetism.
Academia Cristiana
El Robledal
Teacher: Lenin Mejia
Student: Solangel Hernandez
Class: Science
Grade: Nineth
Date: Friday, April 24, 2020
Light from Electricity

2. God created natural lights, the sun and
moon, but He also gave mankind the
ability to produce artificial light. For
centuries, the only artificial light that
people had at night was the flickering
light from fires, candles, oil lamps, or
gaslights. In the 1800s, however man
perfected the ability to produce bright,
steady artificial light through
electricity.
Incandescent lamp:
Although one form of electric light
was invented as early as 180, the first
electric light suitable for household
use was the incandescent lamp,
perfected by the American inventor
Thomas Edison in 1879. For over a
century, the incandescent lamp was
the most common form of household
electric lighting.
Fluorescent lamps:
Unfortunately, incandescent lamp
waste energy because they produce
more heat than light. More efficient
are electric discharge lamps, which
produce light by passing an electric
discharge (a spark) through a confined
gas, causing the gas to glow. An
example of an electric discharge lamp
is the common fluorescent lamp.
CFLs:
For many uses, Edison’s incandescent
lamps are being replaced by compact
fluorescent lamps, or CFLs. Unlike
the long fluorescent tubes often seen
in offices tubes about the size of a
regular incandescent bulb.
Neon light:
Electric discharges can also be used to
produce light different colors. Some
gases, such as neon, glow a brilliant
color when an electric current passes
through them. A neon lamp is an
electric discharge lamp filled with
neon gas instead of mercury vapor.
When an electric current passes
through the tube, the neon gas glows a
brilliant crimson.
LED lighting:
In the early 20
th
century, scientists
discovered that certain combination of
semiconductors produce light at low
temperature when an electric current
flows from one material to the other.
This discovery led to the invention of
light-emitting diodes, or LEDs,
semiconductors device that emit light
when a direct electric current is
applied.