Formulas and Vocab

Question 1

Percent Efficiency

Answer 1

E out x 100%
——-
E in

Question 2

Calculating Electrical Power

Answer 2

E(J)
– = P(W)
T(S)

Question 3

Ohms Law

Answer 3

V=I R

Question 4

How to find the Current

Answer 4

Q
— = I
T

Question 5

Source

Answer 5

Where electrons originate from (Battery and wall outlets)

Question 6

Load

Answer 6

Device that converts electrical energy to another form of energy(Tv, Radio, Motor)

Question 7

Control Device

Answer 7

Device that controls the flow of electric current this can be for safety to stop too much prevent to many electrons flowing through

Question 8

Connectors

Answer 8

Provide a path of electrons to flow freely between the circuit(Wires)

Question 9

Current

Answer 9

The rate of which electrons flow through in any given point

Question 10

Potential Difference [voltage] (V):

Answer 10

How much work can potentially be done by a circuit think of it like a water pipe more water more pressure you add more battery you get more pressure

Question 11

Potential Energy

Answer 11

Potential energy is stored energy that an object possesses due to its position or state. When released or allowed to move, this stored energy can be converted into other forms of energy, such as kinetic energy.

Question 12

Energy

Answer 12

The energy possessed by each electron in a circuit is called electric potential (energy)

Question 13

Secondary Cell

Answer 13

Rechargeable

Question 14

Fuel Cell

Answer 14

Require a direct source of energy at all time

Question 15

Primary Cell

Answer 15

Non-rechargeable because the chemical reaction that produces the flow of electrons is irreversible

Question 16

Current Electricity

Answer 16

the controlled flow of electrons through a conductor from one place to another

Question 17

Static

Answer 17

Static electricity refers to the build-up of electrical charges on the surface of an object, typically caused by the transfer of electrons between objects

Question 18

Conductor

Answer 18

Allows electrons to flow through

Question 19

Insulator

Answer 19

Does Not allow electrons to escape a conductor

Question 20

Friction

Answer 20

When two materials are rubbed together, the electrons from one material can be transferred to the other, resulting in one material becoming negatively charged and the other becoming positively charged.

Question 21

Conduction

Answer 21

Occurs when two objects with different amounts of electric charge come in contact and electrons move from one object to the other

Question 22

Induction

Answer 22

Involves charging a neutral object by bringing another charged object close to, but NOT touching, the neutral object

Question 23

Temporarily via induction

Answer 23

this way of charging offers a temporary charge to the object for example I have a negatively charged balloon and I bring it to a wall the wall will make the electrons move away making it temporarily negative (i.e. NOT permanent, will return to the original charge)

Question 24

Grounding and permanently charging by induction

Answer 24

involves connecting an object to a large body, like Earth, that is capable of removing an electric charge that the object might have

Question 25

AC

Answer 25

In Alternating current electrons move back and forth alternating directions used in electric generators since it is more efficient (Wall outlet)

Question 26

DC

Answer 26

Direct current is when electrons flow in one direction for example a phone