Home
Subjects
Explanations
Create
Study sets, textbooks, questions
Log in
Sign up
Upgrade to remove ads
Only $35.99/year
Science
Engineering
Electrical Engineering
Electricity (revised)
STUDY
Flashcards
Learn
Write
Spell
Test
PLAY
Match
Gravity
Electric Charge and Static Electricity Electric Current Batteries Electric Circuits and Power Electrical Safety
Terms in this set (36)
electricity
The flow of electrons and protons from one atom to another.
static electricity
A buildup of charges on an object.
electric force
The force of attraction or repulsion on a charged particle due to an electric field.
magnetism
The property inherent in the molecules of certain substances, such as iron, to become magnetized, thus making the substance into a magnet
electric current
The continuous flow of electric charges through a material.
conductor
A material through which charges can easily flow. A material that allows electric charge to move through it as an electric current. Usually the charge is carried by electrons, and the conductor is a metal.
electrical power
The rate at which electrical energy is converted into other forms of energy. Measured in watts and kilowatts.
electrical circuit
A set of electrical components connected in a way that provides one or more paths for the movement of charge.
series circuit
a circuit where the parts are joined one after the next. The amount of current is the same in each part of the circuit.
parallel circuit
a circuit where the parts are joined in branches so that the potential difference is the same.
Ohm's law
The law that states that resistance is equal to voltage divided by current.
voltage
That force which is generated to cause current to flow in an electrical circuit.
resistance
The measurement of how difficult it is for charges to flow through a material.
current
Movement of electricity along a conductor. Measured in amperes.
AC Current
A flow of electrons which reverses its direction of flow at regular intervals in a conductor.
DC Current
A steady flow of electrons moving steadily and continually in the same direction along a conductor from a point of high potential to one of lower potential. It is produced by a battery and a generator.
static discharge
The loss of static electricity as electric charges transfer from one object to another.
insulator
A material through which charges cannot easily flow. A substance or body that resists the flow of electrical current through it. Ex: Plastic
battery
A device that converts stored chemical energy into
useful electrical energy.
fuse
A safety device with a thin metal strip that will melt if too much current passes through a circuit.
circuit breaker
A reusable safety switch that breaks the circuit when the current becomes too high.
Advantages to DC current
More controlled, less expensive
Advantages to AC current
More powerful, More efficient for sending electricity over long distances and has more applications.
Power
Work/Time measured in horsepower and watts
What is the difference between a kilowatt and watt hour?
1000 watts= 1 kilowatt
What is electrical energy?
A form of energy that involves the movement of electrons.
Motor
an electrical machine that transfers electrical energy into mechanical energy
Generator
a machine that transfers mechanical energy into electrical energy.
What is a battery and how does it work?
A battery is a device that stores chemical energy to later be transferred into electrical energy
How is electricity produced using Fossil Fuels?
Burning of fossil fuels, runs a generator and produces energy.
Electricity and Light Wind
In our project we built a windmill using a fan to power the turbines to create enough electricity to power a LED
Fundamental Forces and Light Wind
...
Equation for power
Power = Current * Voltage
What are the units for electricity?
amps, kWatt/hrs, Watts, Joules/Second
What are the units for power?
watt, horsepower
How many watts in a kilowatt?
1000
Recommended textbook explanations
Pearson Drive Right Student Edition
11th Edition
Elizabeth A. Weaver, Frederik R. Mottola, Owen Crabb, Randall R. Thiel
899 explanations
Digital Electronics
9th Edition
William Kleitz
440 explanations
Introduction to Logic Design
3rd Edition
Alan B. Marcovitz
414 explanations
Introduction to Logic Design
3rd Edition
Alan B. Marcovitz
414 explanations
Sets with similar terms
The Flow of Electricity and Electrical Circuits
45 terms
S8P5- Electricity & Magnetism.crisp
25 terms
Sci 9: Unit D - Electrical principles an…
52 terms
Harley's electricity cards
43 terms
Other sets by this creator
French Oral Presentation
4 terms
1.2 & 1.3 Ultrastructure of cell and Membrane stru…
27 terms
Adv. Lit. Vocab 3
10 terms
Intellectual and Ideological Movements Terms
14 terms
Other Quizlet sets
MIS 112 midterm
52 terms
AWS Certified Cloud Practitioner Study Guide
195 terms
Lesson 14 Review Questions
13 terms
Chapter 2 - Overview of Transaction Processing and…
60 terms
Verified questions
ENGINEERING
A spherical ice cube (an “ice sphere”) that is 6 cm in diameter is removed from a $$ 0^\circ{C} $$ freezer and placed on a mesh screen at room temperature $$ T_a = 20^\circ{C}. $$ What will be the diameter of the ice cube as a function of time out of the freezer (assuming that all the water that has melted immediately drips through the screen)? The heat transfer coefficient h for a sphere in a still room is about $$ 3 W/(m^2 \cdot K). $$ The heat flux from the ice sphere to the air is given by $$ \mathrm { Flux } = \frac { q } { A } = h \left( T _ { a } - T \right) $$ where q = heat and A = surface area of the sphere. Use a numerical method to make your calculation. Note that the latent heat of fusion is 333 kJ/kg and the density of ice is approximately $$ 0.917 kg/m^3. $$
ENGINEERING
A 6-pack of canned drinks is to be cooled from 18$^\circ{}$C to 3$^\circ{}$C. The mass of each canned drink is 0.355 kg. The drinks can be treated as water, and the energy stored in the aluminum can itself is negligible. The amount of heat transfer from the six canned drinks is (a) 22 kJ (b) 32 kJ (c) 134 kJ (d) 187 kJ (e) 223 kJ
ENGINEERING
A soldering iron has a cylindrical tip of 2.5 mm in diameter and 20mm in length. With age and usage, the tip has oxidized and has an emissivity of 0.80. Assuming that the average convection heat transfer coefficient over the soldering iron tip is $25W/m^2 \cdot K,$ and the surrounding air temperature is $20^\circ C,$ determine the power required to maintain the tip at $400^\circ C.$
ENGINEERING
Construct a linear second-order differential equation that has the given properties. A regular singular point at $x=1$ and an irregular singular point at $x=0$.