2018 2019 ASVAB For Dummies by Angie Papple Johnston

Author:Angie Papple Johnston
Language: eng
Format: epub
ISBN: 9781119476290
Publisher: Wiley
Published: 2018-05-08T00:00:00+00:00

Uncovering the Secrets of Electricity

One day in 1752, Benjamin Franklin electrified the scientific community by tying a key to a kite and picking up an ambient electrical charge from a stormy sky. (You’ve probably heard the story, but what you haven’t heard is that if lightning had struck the key, it would’ve killed Franklin — and in fact, it did kill a German physicist who tried to replicate the experiment the following year.) What that led to was an incredibly important discovery, though: that scientists could harness and store electrical energy from lightning.

Although electricity was just a hobby for Ben Franklin, he created many of the terms used today when folks talk about electricity: battery, conductor, condenser, charge, discharge, uncharged, negative, minus, plus, electric shock, and electrician.

Electricity is a general term for the variety of phenomena resulting from the presence and flow of electric current. You can’t see electricity running through a wire (but you can certainly feel it). You only know electricity is there when you flip on the light switch and the light turns on. Even though electricity appears to be pretty mysterious at first glance, scientists understand a great deal about its properties and how it works.

Electricity is measured in three ways:

Volts: Volts measure the difference of potential between two points.

Amperes (amps): Amps measure the number of electrons that move past a specific point in 1 second.

Ohms: Ohms measure resistance, including anything that could limit the flow of electrons.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.