RAD 106 prelims

Question 1

Small, dense, positively charged center of the atom which contains most of the atoms mass

Answer 1

Nucleus

Question 2

The components are lined up along one path. If the circuit is broken, all components turn off

Answer 2

Series circuit

Question 3

Positively charged particles

Answer 3

Protons (1 amu)

Question 4

Which produces a charge redistribution of electrons in a material

Answer 4

Induction

Question 5

A magnet made from a current bearing coil of wire wrapped around an iron or steel core

Answer 5

Electromagnetic

Question 6

Are composed of smaller subatomic particles such as the proton, neutron, and electron.

Answer 6

Atoms

Question 7

Used the cathode ray tube to discover electrons (plum pudding)

Answer 7

JJ Thomson

Question 8

The electrons in the outermost energy level

Answer 8

Valence electrons

Question 9

Electrons flow in different directions in a wire

Answer 9

Alternating current (AC)

Question 10

The compass wire experiment

Answer 10

Hans Christian Orstead 1777-1851

Question 11

He proposed light as an EM-wave

Answer 11

James Clerk Maxwell

Question 12

Are often referred to as the building blocks of matter

Answer 12

Atoms

Question 13

Is the force of attraction between all masses in the universe; WEAKEST of all forces

Answer 13

Gravitational force

Question 14

Is a type of energy that consists of the movement of electrons between two points when there is a potential difference between them, making it possible to generate what is known as an electric current.

Answer 14

Electricity

Question 15

The number of protons in the nucleus is the?

Answer 15

Atomic number

Question 16

John Dalton’s Atomic Theory 1804

Answer 16

All matter is made of atoms
Atoms of one element are all the same
Atoms cannot be broken down into smaller parts
Compounds form by combining atoms

Question 17

The flow of electrons from one place to another

Answer 17

Current

Question 18

Is the force exerted by magnets when they attract or repel each other

Answer 18

Magnetism

Question 19

The charge on an ion is called?

Answer 19

Electrostatic charge

Question 20

Using a cathode ray tube, he discovered canal rays which are beams of positively charged particles; He is credited with the discovery of protons in an atom

Answer 20

Eugen Goldstein 1850-1930

Question 21

He envisioned atoms as solid, hard spheres, like billiard (pool) balls, so he used wooden balls to model them

Answer 21

Dalton’s early atomic model

Question 22

What influences Resistance?

Answer 22

Material of wire – aluminum and copper have low resistance
Thickness – the thicker the wire the lower the resistance
Length – shorter wire has lower resistance
Temperature – lower temperature has lower resistance

Question 23

Negatively charge ions result from the gain of electrons

Answer 23

Anions

Question 24

The measure of energy given to the charge flowing in a circuit

Answer 24

Voltage

Question 25

Particles that have no charge (neutral)

Answer 25

Neutrons (1 amu)

Question 26

Greek word for uncuttable

Answer 26

Atomos

Question 27

Materials through which electric current cannot move

Answer 27

Insulators

Question 28

Which transfer electrons between two objects in contact

Answer 28

Friction

Question 29

Is the mass of protons plus the mass of the neutrons

Answer 29

Atomic mass (recorded in the SI units: atomic mass units (amu))

Question 31

Examples of Insulators

Answer 31

Styrofoam Rubber Plastic Paper

Question 32

An area around the nucleus where electrons are likely to be found orbiting the nucleus in several energy levels

Answer 32

Electron cloud

Question 33

With a charged body which results in the transfer of electrons

Answer 33

Contact

Question 34

2 main ideas of Democritus

Answer 34

Atoms are the smallest possible particle of matter There are different types of atoms for each material

Question 35

Difference between VOLTS and AMPS

Answer 35

AMPS measure HOW MUCH water comes out of a hose VOLTS measure HOW HARD the water comes out of the hose

Question 36

The opposition to the flow of an electric current, producing heat

Answer 36

Resistance (ohms)

Question 37

Two regions of an atom

Answer 37

Nucleus Electron cloud

Question 38

Smallest particle of an element that can exist alone

Answer 38

Atoms

Question 39

Positively charge ions result from the loss of electrons

Answer 39

Cations

Question 40

Negatively charged particles

Answer 40

Electrons (mass is VERY small)

Question 41

Subatomic particles of atomic nuclei

Answer 41

Gluons- zero charge Quarks- carries protons

Question 42

Greek philosopher that suggested world was made of two things - empty space and "atomos"

Answer 42

Democritus 460 BC

Question 43

Examples of conductor

Answer 43

Metal Water

Question 44

States that the voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperatures remain constant

Answer 44

Ohm's Law

Question 45

Atoms of the same element with varying number of neutrons

Answer 45

Isotopes

Question 46

Occurs when there is a loss of static electricity due to three possible things: friction, contact, induction

Answer 46

Static discharge

Question 47

The greater the resistance

Answer 47

The less current gets through

Question 48

Material through which electric current flows easily

Answer 48

Conductors

Question 49

Discovered the electron; He was the first scientist to show the atom was made of even smaller things

Answer 49

J.J. Thomson 1897

Question 50

Is a path for the flow of electrons. We use wires

Answer 50

Circuit

Question 51

Theory of relativity

Answer 51

Albert Einstein (1897-1955)

Question 52

Discovered the nucleus of a gold atom with his "gold foil" experiment

Answer 52

Ernest Rutherford 1913

Question 53

The build up of an electric charge on the surface of an object; is a potential energy, does not move, it is stored

Answer 53

Static electricity

Question 54

There are several branching paths to the components

Answer 54

Parallel circuit

Question 55

Where electrons flow in the same direction in a wire

Answer 55

Direct current (DC)

Question 56

Father of Physics

Answer 56

Isaac Newton 1642-1727

Question 57

Is responsible for decay of material

Answer 57

Weak nuclear force or weak interaction

Question 58

Is the energy required to remove an electron from an atom, a molecule, or an ion.

Answer 58

Electron binding energy or Ionization potential