Test Study Guide

Question 1

Ohms Law

Answer 1

I=E/R,

E=IxR

Question 2

Watts Law, Law of Power

Answer 2

P=IxE

Question 3

Kilowatt Hour

Answer 3

A unit of power times Time

Question 4

Electricity

Answer 4

Electron, electronics are English words that come from a word with a greek background, Elektron. the literal translation: “To be like amber”

Question 5

Direction of Electron flow

Answer 5

outside the battery the current flows from negative to positive. Inside the battery, electrons move from positive to negative.

Question 6

Conventional current flow

Answer 6

Current flowing from positive to negative

Question 7

Electron current flow

Answer 7

Current flows from negative to positive.

A negative charge is an accumulation of electrons, which flows to the positive (absence of electrons)

Question 8

Circuit

Answer 8

A path for current to flow from a source through conductors, to a device, and then back to source.

Question 9

Closed Circuit

Answer 9

A complete path for current to flow in a circuit.

Question 10

Open Circuit

Answer 10

A break in a circuit that causes electrons to stop flowing. Voltage still exists across the circuit. (Ex an off switch.)

Question 11

Short Circuit

Answer 11

The current has found a shorter or alternate path back to source.

Question 12

to measure voltage

Answer 12

measure parallel

Question 13

to measure amperage

Answer 13

measure in series

Question 14

Watt

Answer 14

the amount of work being done per unit of time.

Question 15

The simplest form of any matter is called an

Answer 15

element

Question 16

Atom

Answer 16

the smallest piece of an element that has all the characteristics of that element.

Question 17

Atoms have three main parts:

Answer 17

Protons, Neutrons, Electrons.

Question 18

Smaller subatomic particles of the proton and neutron are called:

Answer 18

Quarks

Question 19

Charges of atomic particles

Answer 19

Electrons have a negative charge
Protons have a positive charge
Neutrons have a neutral charge.

Question 20

You can tell the element by the number of

Answer 20

positive charges, or protons in the atoms nucleus.

Question 21

Electricity flows from

Answer 21

an excess to a deficiency

Question 22

forces of attraction

Answer 22

unlike charges attract,

like charges repell

Question 23

Valence ring

Answer 23

The outer ring of electrons that can contain a maximum of 8 electrons.

Question 24

Conductor

Answer 24

A material that has 1 or 2 valence electrons in the outer ring which can easily give or receive electrons from flow.

Question 25

Insulator

Answer 25

A material that has 7 or 8 valence electrons in the outer ring which resist giving or receiving electrons from flow

Question 26

Semi-conductor

Answer 26

A material that has 4 valence electrons in the outer ring which falls in between a conductor and an insulator.

Question 27

Voltage Drop

Answer 27

2x(KL/CM)xI

2KLI/CM

Question 28

Specific Resistance of copper alu

Answer 28

Copper 10.4

Alu 17.7

Question 29

Resistance of a conductor

Answer 29

R= KL/CM

Question 30

Forces that produce electricity

Answer 30

Friction
heat
chemical
pressure
light 
magnetism

Question 31

Forces that electricity can produce

Answer 31

Chemical action
heat
pressure
lights
magnetic fields.