Pre Camcards Flashcards
Formula for precentance effience
Mechanical Wave
NEEDS a MEDIUM
Diode
Absolute Presure
Newtons 1. law
An object at rest remains at rest, or if in motion, remains in motion at a constant velocity unless acted on by a net external force
STP
Error Type?
Random Error
Reduced: By using avarge of multible measurements
A wave trough is
BølgeDAL
Force of Tension
Area under Displacement-Force curve shows
WORK in joules
Is the centripital force a fundamental force
NO
It most often is in the form of tension
Capacitance
Formel for x komponent i vektor
Formulas for constructive and destructive interference for 2 waves with equal frekvenses
Resistance Formula
Angular Displacement
Archimedes’ principle
“Every object is buoyed upwards by a force equal to the weight of the fluid the object displaces.”
Capicitor
Filament Bulb
- Følger ikke Ohms lov
- More current ⇒filament gets hotter⇒atoms vibrate more⇒more colisions with flowing electrons⇒increasing resistance
Magnetic Flux Desity
Hvor og hvorfor bruges en comutator
Ultimate Tensile strength
Electric Power
Formula for specific heat capacity c
Electric force FE between 2 charges
Elastic Colision
Total Ekin is conserved
Critical Damping
Formula for power displaced in a recister R
Fundemental Frequency
MINIMUM frequency of standing wave
Resistors in series circuits
- Total resistance is equal to the sum of the individual resistances.
Direction of magnetic field
North to South
Why is high voltage used in power transmition
Consecvense of following formula
What holds Nucleus together
STRONG NUCLEAR FORCE
Electric Field Strength (E)
Lenz law is consecvens of
Conservation of ENERGY
Critical Angle
Factors affecting directions of an induced voltage
Magnetic Fields are resutls of …….
MOVING CHARGES
Behaviour of Alpha in magnetic field
Electric Charge
Work Energy priciple
Background radioation
- Radon gas
- Kosmic radiation (some get trough earths mag-field)
- X-ray
-
Nuclear weapons testing
*
Dopplerecffect formula for observed frekvency fo, when source moves
+ when source moves away
- when source moves towards
Which wave type needs a medium
LONGITUDINAL
Error Type?
Systematic Error
Tæller man displacement i formel for Epot, spring fra ny eller gammel hvile postion i følgende situation
Ny, hvis man ikke Egrav, pot
Resistors in parallel circuits
- Individual resistances diminish to equal a smaller total resistance rather than add to make the total.
HIGH or LOW Thermal Conductivity
Electromagnetic Induction
Current can be induced to flow due to a CHANGING magnetic field
Total Internal Reflection
Formula for RESISTIVITY
Gauge pressure
Pressure measured relative to atmospheric pressure
First law of Thermodynamics
Superposition principle
Lift
Upward-acting force on an aircraft wing or airfoil.
Hvad er formlen for Amperes Law og hvad bruges den til
- B at a distance r from a long straight wire carrying current I
- µ0 er permeability of free space. B afhænger af ledningens materialle
Sammenhæng mellem angular velorcity og speed
Enhed for angular velorcity er radians/secound
Pefectly in-elastoc colision
MUST stick together after colision
Flemings RIGHT hand rule
DYNAMO EFFECT
Describe
0.6 V is THEASHOLD VOLTAGE
Important with this
Finger curled in direction of CURRENT
Current in parallel circuits
Gravertational Field Strength (g)
Lenz Law
Resistance: Impurities of metal, temperature
Factors affecting rate of conduction
Sammenhæng mellem Young’s modulus og k
- A is area
- L is nominal lenth
Particles affected by STRONG NUCLEAR FORCE
Paramagnetisk
- Bliver magntisk ved pårvirkning af eksternt magnetisk feldt
Coulomb’s Law with permittivity of free space
Defernition of a wave
“A disturbance propagating through space”
Lamp
Thermal Radiation is what wave type
Formula for TERMINAL VELORCITY
Stress is defined as
Alpha Decay
Distinction between liquid and gasses
- Gasses are compressible
- Liquids are negligibly compressible
Measurement close to true value
Accurate Measurement
What is this
Potential Divider Curcuit
CONVECTION FLOW
Relationship between wave lengh, frecvency and the speed of light
Strain is defined as
Radition Types
Voltage in parallel circuits
- Voltage is equal across all components in a parallel circuit
Induced magnetism
Normal Force FN
- Contact force
- Always acts perpendicular to contact surface
What is REFRCTION and REFLECTION
Relationship between agular velocity and speed
Upon REFRACTION what is changed
- Speed
- Frekvency
- Wave length
- Speed CHANGES
- Frekvency CONSTANT
- Wave length CHANGES
What type of transformer is this
STEP-DOWN transformer
NEWTON’S SECOND LAW OF MOTION IN TERMS OF MOMENTUM
Responsible for beta day
WEAK NUCLEAR FORCE
Speed of sound
Potential Difference
Constructive and Destructive Interference
Formula for rotational kinetic energy
Formula for Magnetic Flux
Quarcs in hadrons
MELTING and BOILING
Equation for simple hamonic oscilation
Kinematic formula without vf
Specific Gravity
S.G is equal to % of object submerged
GAMMA DECAY
What are the 3 conservations in mechanics
- Conservation of Emek=Epot+Ekin ( in isolated system)
- Conservation of Momentum
- Conservation of Angular Momentum
Formel for y komponent i vektor
Where do we place the zero point of gravitational potential energy
Makes all values of the gravitational potential energy negative.
In-elastic colision
Total Ekin is NOT conserved
Electric Field (E)
- Q1 creates E1 ⇒ E1 exerts force on Q2
Formula for the magnitude of the centripital acceleration ac
Relative penetrating abilities of Alpha, Beta and Gamma
The area under accelleration-time graph shows
Change in velorcity
Formula for Fluid presure
Maxwells RIGHT hand rule
Direction of Magnetic Field around a current carying wire
Newtons 2. law
Resistor
Behaviour of Alpha, Beta and Gamma in a electric field
PITCH relates to…….
Frekvency
Ammeter
Amplitude A defernition
“Maximum magnitude** of **displacement “
Formula for TORQUE
Direction of TORQUE is find by right hand rule
Formula for wave lenths at the n’th harmonic node for a standing wave
L is distance from start node to finish node (pipe lenth)
Formula for Buoyant force
Because bottom of an object is always deeper in a fluid than the top of the object
What type of transformer is this
STEP-UP transformer
Only way to change speed of waves
Change the properties of the medium it travels in
Kinematic formula without time
Diffuse reflection
Formula for momentum p
Momentum is a vector
The limit of proportionality
Point beyond which Hooke’s law is no longer true
Formula for impulse J
Impules is a vector
What type of wave is sound
Longitudinal wave
Compresion wave
Relationship between number of primary coils, secoundary coils, primary voltage and secoundary voltage
Variable Resistor
Antinode and node
LOUDNESS relates to ……
AMPLITUDE
Kinetmatic formula without displacement
100% transformer efficiency and conservation of energy gives following formula
DAMPED oscillations
Planck’s equation
E: energy of the photon absorbed or emitted
f: frequency of the photon
h: is Planck’s constant, 6.626•10-34 J•s
Relationship between Amplitude and Intensity
Kinematic formula without acceleration
Defernition of Terminal veloricity
Max v attainable by an object as it falls through a fluid
NTC Thermistor
- NTC stands for “Negative Temperature Coefficient”
- Resistance decreases as temperature increases
Difference between PD and EMF
- PD is the work done in taking a unit charge from one point of the circuit to another
- EMF is work done by a source in taking a unit charge round the complete circuit
Energy Transfer
Formula for specific charge of electron
Centripital Force
Cell
Boyles Law
Beta-_PLUS_ deay
Current in series circuits
The amount of current is the same through any component in a series circuit.
Place of node and antinode in half open pipe
The conservations during radioactive decay
Factors affecting magnitude of an induced voltage
Range around measurement within true value is expected to lie
Uncertainty
Behaviour of Beta-MINUS in magnetic field
Use Flemmings LEFT hand rule
Internal Resistance
Gravertational force FG between 2 masses
Formula for center of mass
Voltage in series circuits
- Total Voltages is equal to the sum of all voltages
Flemings Left hand rule
MOTOR EFFECT
and
FREE MOVING CHARGES IN B-FIELD
Voltage
Weight
Weight W is the force of gravity Fg exerted on an object
Pascal’s principle
Relationship between agular displacement and distance
LDR’s
Photo Resistors
- LDR stands for light dependent resistors
- In dark resistance is very _high_ (1M
-
Resistance decreases as the intensity of light they are exposed to increases
*
The area under velorcity-time graph shows
Displacement
Drag
Modstand fx. luftmodstand, vandmodstand osv.
Hooke’s Law
“Specific”
Per unit mass
Bridge Rectifier
Formel for Fskrå på en skrå overflade
Simple Harmonic Oscilator
- Restoring force is proportional to displacement
- Can be decribed with sine and cosine functions
Average Power
Vigtig Formula for gliding stopping due to friction
Trick for pulley-table problems
Treating systems as single object
Conservative Forces
- Only depends on initial and final position
- Eg. Gravitational and spring
- NOT Drag or friction
Natural Frequency
Formula for Kinetic Energy
What is this
Velorcity Selector
What realtionship can be used instead of the formula of conservation of Ekin in problems with elastic colisions
Snells Law
If force i applied away from the center of mass of an object, then the object will
Rotate
Defernition of EMF
Work done in driving unit charge around a complete circuit
Formula for wave lenths of standing wave in half open pipe at n’th harmonic node
Interpretation of output voltage graph
Traveling distance of Decay in air
- Alpha : 5 cm
- Beta : 15 cm
- Gamma : several meters
Whar is the range of frekvencies the human ear can observe
Formula for potential energy in a non-uniform gavitational field
Place of Antinodes in open pipe
Coherent Waves
Constant Phase Difference
Repeated measurement is the same
Precise Measurement
Determining wave lenth
Magnetic Domains are due to
Unpaired elektron spin
The angular velorcity in the equation of a harmonic movement for a sping is equal to
Describe
Finding EMF and internal recistance
- Mesure Terminal PD and corosponding I
Formula for moment of inertia, when all mass is a same r
Stokes Law
Mass of alpha vs. electron
10 000 : 1
Parallax Error
Formel for static friction coeffitient µs
CONDUCTION
Formel for FN på en skrå overflade
MOTOR EFFECT
Current carying wire experience force, when placed in a magnetic field
Latent heat of fusion and Latent heat of vaporizartion
Deffinition of a calorie
Energy needed to heat 1 g water 1 0C
Work formula
Period T defernition
“Time required for an entire cycle”
Moment is the same as
TORQUE
Formula for TOTAL MOMENT OF INERTIA
Is kinetic energy a vector
- No it is only a scalar
- It is also ways positive
Diffraction Equation
What type of wave is light
Transverse wave
Body executing SIMPLE HARMONIC motion
Specular reflection
Formula for NET impulse Jnet
In perfect circular movement:
Velocity is……
Angular Velocity is …..
Velocity is changing
Angular Velocity is constant
Mass
Mass m is a measure of the inertia of the object
Evaporation
The steady current, delivering same average power as A.C
THE ROOT MEAN SQUARE
Battery
Voltmeter
What is rarefaction
Det modsatte af compresion
Work MUST be done to seperate atoms
Formula for DRAG FORCE
Magnetic Flux
Field strengh general deferniton
Formula for potential spring energy
Problem causing reading to differ from true value
Error
Directions of electric field lines
Refraction Index
CONVECTION
Voltage is induced when ……..
- Wire cuts fieldlines
- Magnetic Field changes
Perfect Diode
- Acts like a perfect conductor when voltage is applied forward biased
- Acts like perfect insulator when voltage is applied reverse biased.
Definition of Current
Charge per time (ladning per tid)
Torque acting clockwise is…….
NEGATIVE
Elastic Limit
Minimal value of the stress which produces plastic deformation
4 FUNDERMENTAL FORCES OF PHYSICS
Defernition of FLUID
Fluids take shap of container
Formel for kinetic friction coeffitient µk
Behaviour of gamma in magnetic field
Brownian motion
AC
Alternating Curent (veksel)
Acceleration in SIMPLE HARMINOC MOTION
Young’s modulus
Measures the resistance of a material to being elastically deformed
Newtons 3. law
If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A.
Beta-MINUS Decay
Defernition of a PHOTON
The elementary particle, or quantum, of light
Potential energy in uniform gravitational field
Fixed Resistor
- Følger Ohms lov
- Antager konstant temperatur
Instentanious Power
Gravitational Potential
WORK pr. unit MASS bringing a MASS from infinity to the point
Relativ ionising abilities of Alpha, Beta and Gamma
DC
Direct current (jævn)
Particles NOT affected by STRONG NUCLEAR FORCE
Randomness of decay
Radioactive decay is a stochastic/random process at the level of single atoms. According to quantum theory, it is impossible to predict when a particular atom will decay
Inetia
- Inertia is the tendency of an object to resist change in velocity
- Inetia deppends on mass
Dopplerecffect formula for observed frekvency fo, when observer moves
+ when obs moves towards source
- When obs moves away from source
Lonzents Force Law
Between State Change
How is electromagnetic waves different from waves at sea
Consist of 2 waves oscillating perpendicular to one another
Faradays Law of Induction
Relationship between wave frekvency f and wave period T
Potential Divider Equation
What must the surface be in order to produce ECHO
- SMOUTH
- HARD
Difference between scalars and vectors
Sping constant from force and extention
Ferromagnet
- Permanent magnetisk
The centripital force here is due to
MOTOR FORCE
