Honors Science Laplace
Terms in this set (60)
the electrical pressure, what pushes the electrical current through a circuit
the flow of electrons (charge) along a wire
limits the flow of electricity and are used to control or limit electricity in a circuit, increasing it reduces the flow of electricity
a light-sensitive resistor, its value changes from nearly infinite in total darkness, to about 1,000 when a bright light shines on it
contains a special wire that glows bright when a large electric current passes through it, voltages above the bulb's rating can burn out the wire
what has polarity
Light emitting diode, one-way light bulb
what provides the voltage in SnapKits?
reduced the brightness
in the snap kit how did the resistor effect light?
it reduced the speed of the motor
in the snap kit how the the resistor effect the motor?
electrical to electromagnetic
in the snapkit, what is the energy conversion in the lamp?
electrical to mechanical
in the snapkit, what is the energy conversion in the motor
electrical to mechanical (sound)
in the snapkit what was the energy converion in the speaker
it only works when the current is going in one direction
what is special about an LED?
opens or closes the circuit turning the bulb on and off
what does a switch do?
a sound activated switch, when you clap, it turns the light on
what does the whistle chip do?
ability to conduct in one direction only
certain components can only handle a certain amount of current so you may need a resistor with the LED
why do you need a resistor with some components?
a continuous loop that electrons can follow with no gap
a circuit that has an opening where the electrons can not travel on
in which kind of circuit can a current flow in?
material with loosely held electrons which can conduct electricity
material with tightly held electrons which cannot conduct electricity
what kinds of materials make good conductors?
what kinds of materials make good insulators?
path along which electrons can flow
can be opened or closed to sop or allow electrons to flow
something connected to the circuit that needs electrical current (ex: lamps, speakers, and motors)
what kind of circuit has its own path to the battery?
in what kind of circuit can you remove one and all the others still light up?
in what circuit, if you add more, the bulbs remain as bright as the others?
in what kind of circuits are the loads all on one circuit?
in what kind of circuit, if you add a load they all become dimmer
in what kind of circuit, if you remove a load, all the lights go out
what kind of circuits are Christmas lights (most of the time)
circuit that carries more than a safe amount of current, too much current, tries to carry too much of a current
when insulation that separates wires in a circuit wears away and allows the wires to touch; can overheat and cause a fire, you gave it a shortcut and it got too hot and burned the fuse out
fuses and circuit breakers
breaks a circuit and stop the flow of electricity when there is too much current in a circuit
have a metal strip that connects the circuits, when it overheats it melts and opens the circuit, which stops the flow of electricity, have to be replaced when they blow
have a bimetallic strip that connects the circuit, when overheats, bends and opens the circuit to stop the flow of electricity , can be reset by bending the strip back when they trip
strip made of 2 metals that expand at different rates, this causes the strip to bend when heated
in thermostats, thermometers, circuit breakers
where are bimetallic strips used?
the current goes in one and out the other to complete the circuit
in a plug (flat prongs) what happens?
connects to a wire in the electrical system that is grounded, connected to the ground
what is the larger round plug in an outlet?
what takes another form of energy and produces electricity?
the information sent through a circuit
smoothly varying signal produced by varying the voltage or current (most things don't use it anymore)
information encoded as 1s or 0s, the current is pulsed on or off, we have recently changed all TV's to this
a crystalline solid that conducts current only under certain conditions (most made with silicon or germanium)
particles that spin around the nucleus of atoms in shells
what charge do electrons have?
they can be moved from one atom to another
what happens if a force is applied to the outermost electrons?
form of electricity, it is electrons moving from one cloud to another or from a cloud to the ground, static electricity
thickness of wire, length of wire, temperature
what does resistance depend on?
the resistance increases
what happens to resistance when its thickness, length, and temperature increases
it reduces it
how does resistance affect current?
it increases it
how does voltage affect the current?
what is the relationship between current and resistance
what is the relationship between current and voltage?