Chapter 11 Flashcards
what is a device producing static electricity
electrostatic generator
what is the most common electrostatic generator used today
van de graff
where does an electric charge always move to on a conductor
the outside
will the interior of a car be safe in a lightning strike? why or why not?
yes, because the electric charge would be fined to the exterior of the car
what occurs due to a massive buildup of negative charge in the atmosphere and positive charge on the ground
lightning
device invented by Benjamin Franklin to protect buildings from lightning
lightning rod
natural electrostatic phenomenon referred to as a corona discharge
St. Elmo’s fire
who is credited with inventing the first capacitor
Musschenbroek
name of the device that musschenbroke invented to store static charge
leyden jar
Leyden jar was an early form of a what
capacitor
how was the Leyden jar able to store charge
foil on the interior, glass, and foil on the exterior so the charge can store itself on the interior foil
the first electric light suitable for household use
incandescnet light
how does the incandescent lamp produce light
there is a vacuum and the energy goes through a wire which produces joule heat
the thin wire in an incandescent lamp
filament
which lamp produces light by passing an electric current thru a long tube filled with a low pressure mix of mercury vapor and argon
fluorescent
does the electric arc produced by an electric lamp produce visible light
no, it instead produces uv light
if the fluorescent lamp does not produce visible light from the electricity, how does it produce visible light
the phosphor on the interior of the tube makes a phosphorescent light
what type of lamp became a smaller version of the fluorescent lamp
CFL
which type of lamp is an electric discharge lamp tied with neon gas
neon lamp
what type of lamp is a semi conductor that uses small amounts of direct current to produce light
LED
what is a simple device that converts electricity to back and forth motion
solenoid
what is essentially an electromagnetic switch used for comms
telegraph
who invented the telegraph
Samuel morse
electromagnetic switch
relay
device converting pulses of electricity into sound
loudspeaker
device that uses electricity to create motion
motor
what is the permanent magnet used to create a stationary magnetic field in a motor
stationary magnet/field magnet
part of the motor that spins
armature
why is the armature capable of spinning continually when you have magnetic poles
the poles keep switching
what is an electrochemical cell used to produce electricity
voltaic cell
which specific type of voltaic cell is capable of being recharged
storage cell
which terminal in a battery is the negative terminal
anode
which electrode delivers electrons to the circuit
anode
positive terminal of a battery
cathode
which arrangement of batteries allows us to increase the voltage
series arrangement
yes or no - if I have batteries arranged in series, does the current increase
no
if I have 3 batteries, they are 1 volt a piece, and they deliver a current of 0.5 Amperes - if they are arranged in parallel, what will be the current
1.5 Amperes
in general, when I arrange batteries in parallel, what will increase
current
ability of magnetism to convert mechanical motion into electricity
electromagnetic induction
which scientist is credited with discovering electromagnetic induction
faraday
name the ways that electromagnetic induction can be increased
- moving magnet faster
- creating more coils
- increasing the magnet’s strength
device that uses electromagnetic induction to produce electricity
generator
in order for a generator to produce electricity, the armature must cut through what
the lines of flux
AC vs DC motor or generator, which device uses a commutator
DC
what type of generator has no moving parts
MHD generator
what was the primary reason why an MHD generator is not feasible
the fluid being used must be moved at very high speeds
which type of alternative form of energy converts sunlight into energy
solar energy/ photovoltaic cells
which type of alt. form of energy requires the splitting apart of atomic material
nuclear fission
which power generation uses reservoir or backed up water
hydroelectric
device that increases or decreases the voltage uses electromagnetic induction
transformer
in most cases of power generation, it occurs because something is moving a turbine. what is the primary material moving those turbines
water
thinking about generators, how can I increase the amount of electricity that a generator produces (3 ways)
- increase the number of turns
- increase speed of rotation
3.increase strength of the magnetic field
what device is in a AC generator that is not in a DC generator
slip rings
several voltaic cells connected ins Eries to each other
batteries
why is a slip ring necessary in an Ac generator but not in a dc generator
in an Ac generator, it has an alternating current and its automatically rotating. Slip rings stop the wires from twisting around the armature
series of long and short taps used to communicate
morse code
which type of lamp is the most energy efficient
LED
if an electric vehicle is running on batteries, what current will it be running on?
direct current
if you add multiple batteries, will the DC increase
yes
how do you increase an AC power
turn the generator more
where does AC come from most commonly
outlets
