Electricity Flashcards
Which is a better conductor? Copper or Alumnimum?
Aluminum is a better conductor
What happens to electrons when you heat them up?
They go to a higher shell. Atoms gives off an Electromagnetic shock waves and forms visible light. You get bands of colors depending on the number of shells.
Why don’t we use aluminum as a conductor?
Aluminum is not a solid, it is a liquid so it oozes away from the connector and cause an electrical fire. Aluminum alloys are different
Can you solder with aluminum?
No you can’t
Can you solder with copper?
Yes
Are electrons deflected by a magnetic field?
Yes
What are neutrons and protons made out of?
Quarkz
Electrons cause an electronic field. If we have two electrical charges that are close together?
The closer they are together the more charge you get between. How is that force related to distance? Inverse square law aka coulombs
What is Coulomb’s law?
Coulomb= how much charge you have between electrons. Closer= huge amount of charge . Further= decreases amount of charge. Coulomb’s law obeys and uses inverse square law. And predicts the charge of two electrons
What is the difference between a conductor and a insulator?
If you add an electron to a conductor it passes it on. If you add an electron to an insulator it doesn’t pass it on. A conductor freely donates electrons to another atom.
Is silicon a conductor or an insulator?
Pure silicone is a semi-conductor. Only if you add impurities to silicone it can become a conductor. If boron is added it will be positive. If phosphorus is added it will be a negative charge.
So, if you can make silicone conductive..what do you call it if there is one layer of P-type and one layer of N type?
P&N layer together makes electricity only moves in one direction= diode.
If you reverse the diode what happens?
Then you get a depletion zone in the middle of the diode and you will get a capacitor. Reverse biased diode= capacitor. Diode has 2 layers of silicone
What if you have 2 layers of N separated by 1 layer p or 2 layers of p separated by 1 layer of N?
Transistor. It has 3 layers of silicone. PNP vs. NPN
Something that has electrical charge in a field has potential energy if it is the electrical field?
Yes If it loses electrical charge, it does not have potential energy anymore.
What are the 3 different units in electricity?
- Volts- measure of potential energy available (energy you have to push electrons)
- Current
- Resistance
When you put electrons across a plate (something that is an insulator), conductor- insulator- conductor is a?
Capacitor (2pieces of metal separated by an oil film). Electrons can only move across capacitor only if you get enough voltage so it will skip across the insulator.
What moves across by induction?
Induction involves magnetism
What is the unit of magnetic strength
Gauss
Can electrons move by induction?
Yes, you are inducing the movement of magnetic field (moves m =by induction).
What does a capacitor store?
Electrons
When voltage turns on capacitor, what goes up first?
Current goes up before voltage , current leads voltage (battery)
What is an inductor doing?
Stores voltage, voltage leads current
What is a faraday?
Watts is a unit of power, 1 farad= 1 coulomb of charge at 1 volt. Capacitor holds 1 coulomb of electron across the capacitor is 1 volt= 1 farad
