Electricity

Question 0

Which is a better conductor? Copper or Alumnimum?

Answer 0

Aluminum is a better conductor

Question 1

What happens to electrons when you heat them up?

Answer 1

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.

Question 2

Why don’t we use aluminum as a conductor?

Answer 2

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

Question 3

Can you solder with aluminum?

Answer 3

No you can’t

Question 4

Can you solder with copper?

Answer 4

Yes

Question 5

Are electrons deflected by a magnetic field?

Answer 5

Yes

Question 6

What are neutrons and protons made out of?

Answer 6

Quarkz

Question 7

Electrons cause an electronic field. If we have two electrical charges that are close together?

Answer 7

The closer they are together the more charge you get between. How is that force related to distance? Inverse square law aka coulombs

Question 8

What is Coulomb’s law?

Answer 8

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

Question 9

What is the difference between a conductor and a insulator?

Answer 9

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.

Question 10

Is silicon a conductor or an insulator?

Answer 10

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.

Question 11

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?

Answer 11

P&N layer together makes electricity only moves in one direction= diode.

Question 12

If you reverse the diode what happens?

Answer 12

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

Question 13

What if you have 2 layers of N separated by 1 layer p or 2 layers of p separated by 1 layer of N?

Answer 13

Transistor. It has 3 layers of silicone. PNP vs. NPN

Question 14

Something that has electrical charge in a field has potential energy if it is the electrical field?

Answer 14

Yes If it loses electrical charge, it does not have potential energy anymore.

Question 15

What are the 3 different units in electricity?

Answer 15

1. Volts- measure of potential energy available (energy you have to push electrons)
2. Current
3. Resistance

Question 16

When you put electrons across a plate (something that is an insulator), conductor- insulator- conductor is a?

Answer 16

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.

Question 17

What moves across by induction?

Answer 17

Induction involves magnetism

Question 18

What is the unit of magnetic strength

Answer 18

Gauss

Question 19

Can electrons move by induction?

Answer 19

Yes, you are inducing the movement of magnetic field (moves m =by induction).

Question 20

What does a capacitor store?

Answer 20

Electrons

Question 21

When voltage turns on capacitor, what goes up first?

Answer 21

Current goes up before voltage , current leads voltage (battery)

Question 22

What is an inductor doing?

Answer 22

Stores voltage, voltage leads current

Question 23

What is a faraday?

Answer 23

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

Question 24

Does current flow from negative to positive ?

Answer 24

Electrons flow from negative to positive. Current flows from positive to negative

Question 25

What does a resistor do in a circuit?

Answer 25

Loses voltage. The bigger the resistance the bigger the resistance loss. Resistance causes a loss in voltage

Question 26

What is Ohms law?

Answer 26

V=IR (voltage)

Question 27

Faraday’s law is?

Answer 27

For electrical charge. The closer you get an electron together the more they repel each other. Lots of force

Question 28

When you turn a light bulb on the lowest resistance is?

Answer 28

When you turn it on (burn out). Resistance goes up after it has been turned on and current goes down.

Question 29

What are supercomductors?

Answer 29

They are cooled in liquid hydrogen ( when they warm up they don’t conduct well). At absolute zero the conductor has no electrical resistance. The colder something gets the lower electrical resistance.