xray physics powerpoint test 1

what was the dalton atom?

had hooks and eyes

what is the vertical rows?

group

what is the horizontal rows?

period

what is the equation for shells?

2n²

what is a mixture?

the combination of two of more substances in such a way that they
are not chemically bound together

what is some atoms exist in an excited state and are
characterized by an unstable nucleus. In
order to achieve stability, the nucleus will
emit particles and energy and transform itself
into another atom.

radiation decay

what happens in beta emission?

loses an election

what happens in alpha emission?

loses 2 protons and 2 neutrons

what is eletrostaics?

The study of stationary electric charges

The SI unit of charge

coulombs

what are the four laws of electrostatics?

opposites attract, charge loves sharpest curve, charge is distorted evenly, colbombs law

does electrical charge pefer internal or external?

external

what makes a produced eletrificated

removed or gained an electron

what causes eletrificated

contract, friction, induction

what is electrical field?

an area or region in which an
electric charge will experience an electric force

The closer the lines are,
the ______ the force
acts on an object

stronger

If the lines are ______
apart from each other,
the strength of force
acting on an object is
weaker

further

what is grounding?

creating a charge of 0

what is electrodynamic?

The study of electric charges in motion

Potential difference unit

voltage

Current unit

amps

Resistance unit

ohms

The difference in electrical energy between
two points in an electric circuit (due to the
excess of electrons at one point relative to the
other)

potential difference

It is the amount of electric
charge flowing per second

electrical current

always opposite that of electron flow

direction of electrical current

what are the two types of electrical current

AC and DC

what is DC?

Electron flow is always in the same direction

what is an example of DC?

battery

what is AC

Electrons reverse the direction of flow 60 times
per second

what is an example of AC?

electric in home

what is that property of the
circuit which opposes or hinders the flow of an
electric current

resistance

what is the the factor of resistance

material, length cross sectional area, temp

Materials in which the electric charges move
freely

conductors

Contain “loosely” bound electrons that are able to
drift from one atom to another quite freely

conductor

between those of insulators and conductors
(examples are silicon and germanium)

semiconductor

what is ohms law

V=IR

If a current of 4 amps flows through a
resistance of 60 Ω, calculate the potential
difference across it.

240 V

A kitchen toaster draws a current of 2.5 A. If
the household voltage is 110 V, what is the
electric resistance of the toaster?

44 ohms

If a potential difference of 6 volts is applied to
a 3 Ω resistance, calculate the current that will
flow through it.

2 amps

An electric circuit whose component parts are
arranged end-to-end so that current passes
consecutively through each part

series

Wherein the component parts are connected as
branches of the main circuit so that the current is
divided among them

parallel

rules of series circuit

The total resistance is equal to the sum of the individual
resistances
The current through each circuit element is the same and is equal
to the total circuit current
The sum of the voltages across each circuit element is equal to
the total circuit voltage

A 6 V battery is connected across a 10 Ω and a
20 Ω resistor connected in series. What
current flows in the circuit and what is the
potential difference across each resistor?

.2 A, 2 V, 4V

series

An electric circuit has, in series, appliances
with these resistances: 1 ohm, 2 ohms, and 3
ohms.
– What is the total resistance?
– What is the total voltage if the current is 15
amperes?
– Find the voltage in each resistor.

6 ohms, 90 volts, 15 volts, 30 volts, 45 volts

parallel

A 6 V battery is connected across a 10 Ω and a
20 Ω resistor connected in parallel. What is
the total resistance of the circuit and the
current flowing through each resistor?

6.67 ohms, .6 A, .3 A

parallel

A circuit has the following resistances in
parallel: 1 ohm, 2 ohms, and 3 ohms. The
potential difference is 6 volts.
– Find the total resistance.
– Find the total current in each branch and in main
line.

6/11ohms, 6A,3A,2A, 11A

.

what is electrical power measured in?

watts

what is the electrical power equation?

p=iV

A hairdryer has a electric potential of 250
volts and a current of 2 amps. What is it’s
power consumption?

500 watts