Instructions:

• Answer 50 questions in 15 minutes.
• If you are not ready to take this test, you can study here.
• Match each statement with the correct term.
• Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. What is electromagnetic induction?
(n1)sin(theta1) = (n2)sin(theta2)
Electromagnetic induction is the generation of an Emf by moving a conductor through a magnetic field. emf=change in flux/dt
In front of the mirror - in the light.
It is the net force pointing towards the center.


2. What is needed for electromagnetic induction to occur?
Electromagnetic induction is the generation of an Emf by moving a conductor through a magnetic field. emf=change in flux/dt
In front of the mirror - in the light.
E=hf=hc/(wavelength)
Electromagnetic induction occurs when a conductor is moved through a magnetic field such that a component of the fields is perpendicular to the current;s direction.


3. Unit of energy for electricity.
Electromagnetic induction is the generation of an Emf by moving a conductor through a magnetic field. emf=change in flux/dt
The centripetal force is the net force. It's magnitude is calculated from F=ma where 'a' is the centripetal force.
The NET work BY a system is the area enclosed in a cycle on a PV diagram.
V - a Joule/Coulomb


4. How is the direction of the force on a current carrying wire calculated?
Open right hand rule
When it is on the same side as the image?
Vertical direction
Lenses that are fatter in the middle than on the edges.


5. What happens at the critical angle?
Statistically speaking - energy flows from hot to cold.
Bends waves around small objects and the interference of waves from a coherent sources.
Atomic mass number minus atomic number.
The refracted light ray is bent 90°. (Parallel to the interface surface.)


6. What is the difference between emf and voltage?
Diverging
The centripetal acceleration points along the radius towards the center of the circle. (Just like the centripetal force.)
Emf is the maximum available energy per charge at the terminal of a power source. Voltage is the actual available energy per charge at the terminals of a power source. Some energy is lost due to the source internal resistance.
KE=(3/2)kT where k is Boltzman's constant


7. What is the formula relating emf and voltage?
Impulse is the change in momentum
It is the release of photoelectrons released by photons with an energy (E=hf) above the work function.
When a body is moving at a constant velocity or not moving at all.
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)


8. What is the relationship between voltage - current and resistance?

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9. S.I. unit of pressure
Convex
The release of a Helium nuclei - 4 -2 He2+
Pascal
Work


10. If you double the mass of one planet - triple the mass of another - and move them twice as far apart - what happens to the force of attraction between them?
Alpha
Velocity has a direction and speed does not have direction.
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
The new force is 2/4 or 1/2 times the old force. ...Because the force of gravity varies directly with the masses and inverse squared to the distance apart.


11. What does upward slope on a displacement versus time graph imply about the velocity.
Work done 'BY' the gas.
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
The velocity is positive
The charge on each capacitor.


12. In a pendulum or spring - what are the displacement - velocity - PES - and K at maximum displacement?
This is the highest point of the swinging motion. PE is at a maximum. Displacement is the greatest from equilibrium. KE and Velocity are zero.
2(pi)R/T ...Circumference/Period
The volume under water
frequency (Think of the color as not changing.)


13. What is force times the perpendicular distance?
A1v1=a2v2
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet
Torque
Current stays the same for resistors in series.


14. What is the path of a charged particle in a magnetic field?
Bernoulli's equation - Flow Rate = Volume/time
V=kq/R
The particle travels in a circle. Radius=momentum/qB
Change in voltage across the resistor or capacitor.


15. When is the image negative for a lens?
When it is on the same side as the image?
Atomic mass number minus atomic number.
F=kq1q2/R^2
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.


16. How does the speed change when the pressure is decreased?
They fall - vertically - the by the same amount in the same time.
The force is perpendicular to the motion to get a circular path of motion. (Think about centripetal force.)
Vy=Vyo + gt ...Watch the signs.
Speed ups


17. How is tube length and wavelength related for a tube that is closed on ONE end?
Heat - (the 'Q' variable) - is NEGATIVE when thermal energy is being REMOVED from a system.
Only 1/4 wavelength fits in the tube. L=wavelength/4
convex mirrors are diverging mirrors.
F=Bilsin(theta) ...F=Force (N) - B:=magnetic field (T) - i=current (A) - l=length of wire in the field (m) - theta is the acute angle between the field and current's directions.


18. Under what conditions is heat negative?

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19. What is the energy equation if a force (friction) through a distance results in heat and thus a change in temperature?
the refracted ray bends AWAY from the normal line.
KE=Work
How quickly you change velocity.
The thicker the wire - the lower the resistance.


20. Electric force felt by a charge due to another charge.
Newton
How quickly you change velocity.
F=kq1q2/R^2
It is an arrow that DOES NOT touch the body. Recall that the net force is the answer when all the forces are added up.


21. When are f - p - q - ho - hi - and M positive for mirrors?
When the object is beyond the focus for a concave mirror.
The release of an electron and antineutrino or the release of a positron and a neutrino.
The electric field forces charges to move.
Q=0 because thermal energy is not transfered between the system and its surroundings


22. What is the relationship between energy - frequency - and wavelength in any wave?
'q' is a single particle's charge and 'Q' is the sum of all the charges. Q=q1+q2+q3+q4...
E=hf=hc/(wavelength)
Change in voltage across the resistor or capacitor.
The centripetal force is the net force. It's magnitude is calculated from F=ma where 'a' is the centripetal force.


23. S.I. unit of every kind of energy
Joule
Force= Pressure/Area
Watt
KE=(3/2)kT where k is Boltzman's constant


24. What is the y intercept of the velocity time graph?
Break it up into x and y components using trig - add up the components.
The initial velocity - (Vo in the formulas)
The new force is 2/4 or 1/2 times the old force. ...Because the force of gravity varies directly with the masses and inverse squared to the distance apart.
Vertical direction


25. What is the energy equation if you see a particle accelerated perpendicular to two charged plates - or the problem states that the particle is accelerated through a potential difference?

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26. What quantity is calculated from slope of the displacement versus time graph?
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
velocity
But placing more obstacles in the path of the charge's flow.
Pascal


27. Condition for no rotation
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet
The measure of the average kinetic energy of the molecules.
Sum of the torques equal zero.
It is towards the center and downwards a little. It is the sum of the normal force perpendicular to the bowl and the weight downwards.


28. Which kind of mirror can show a real image?
(1) Bounced off the vertex. (2) Parallel the through the focus. (3) Through the focus and parallel.
The energy required to remove an electron or nucleon from a molecule.
Concave
Work is the change in kinetic energy. Work transfers energy to and from a body


29. What is the energy equation for the change in temperature if it results from a loss in KE?

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30. When light travels from MORE dense to LESS dense mediums - how does the refracted ray bend in relation to the normal line?
the refracted ray bends AWAY from the normal line.
The nucleus
The new force is 2/4 or 1/2 times the old force. ...Because the force of gravity varies directly with the masses and inverse squared to the distance apart.
Electromagnetic induction occurs when a conductor is moved through a magnetic field such that a component of the fields is perpendicular to the current;s direction.


31. What shape is a diverging mirror?
convex mirrors are diverging mirrors.
the refracted ray bends TOWARDS the normal line.
The acceleration is towards the center. It is supplied by the normal force and points towards the center.
The longer the length of wire - the higher the resistance.


32. What kind of mirror has a positive focus?
kg•m/s
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
Converging lenses have a positive focal length.
Concave


33. How does the closed right hand rule work in electromagnetic induction?

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34. Which type of lenses have a POSITIVE focal length?
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.
The velocity is positive
Converging lenses have a positive focal length.
The interaction between an oscillating electric magnetic fields that are oriented 90° to each other. It propagates indefinitely because the wave takes its own medium.


35. Which kind of mirror always has a virtual image?
g=zero so h=(Vyo)t
Bernoulli's equation - Flow Rate = Volume/time
Convex
The bouncing of light


36. How is sum of force (net force) depicted in a free body diagram?
It is an arrow that DOES NOT touch the body. Recall that the net force is the answer when all the forces are added up.
Weight ...w=mg
Electromagnetic wave exits the electrons to a higher orbital. When the electron relaxes - a wavelength of light is given off.
ZERO. Because the force is perpendicular to the displacement . (Open right hand rule.)


37. What is an isotope?
Same number of protons by a different number of neutrons. e.g. Carbon-12 versus Carbon-14
E=V/d
Ohm's Law: V=IR
Vx=(Vxo)t ...Recall that there is no acceleration in the horizontal direction.


38. Which kind of mirror cannot magnify an image?
A reflected ray's phase is changes by 180° when the ray is bounced as it tries to travel from a lower to higher index of refraction. It is also changed y 180° when it bounces off of shiny surfaces.
Convex
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
Torque


39. How are velocity and speed different?
Velocity has a direction and speed does not have direction.
THe force that holds the nucleus together.
'm' is replaced by 'q -' and 'g' is replaced by 'E.' W=mg is replaced by F=qE. The second formula describes the force on a charged particle in uniform electric field.
Every point on a wave front is a secondary source.


40. What shape is a converging mirrors?
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
Vertical direction
x=(1/2)at^2 Remember - the word 'dropped' implies no initial velocity.
Concave mirrors are converging mirrors.


41. What did Rutherford discover?
Sum of all the energy forms before a condition equals the sum of all the energy forms after the condition.
The nucleus
It is an arrow that DOES NOT touch the body. Recall that the net force is the answer when all the forces are added up.
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2


42. The 'V' is (rho)Vg
The volume under water
E=hf=hc/(wavelength)
(mg)sin(angle)
Atmospheric pressure


43. What is an object placed when the distance between it and the mirror is positive?
wave speed = (wavelength)(frequency)
The velocity is positive
In front of the mirror - in the light.
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)


44. What stays the same for resistors or capacitors in parallel?
Atomic mass number minus atomic number.
'm' is replaced by 'q -' and 'g' is replaced by 'E.' W=mg is replaced by F=qE. The second formula describes the force on a charged particle in uniform electric field.
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
Change in voltage across the resistor or capacitor.


45. What is conservation of energy and what is its significance?
The centripetal force points along the radius towards the center of the circle.
Work of a system is equal to 1-Qc/Qh
The release of an electron and antineutrino or the release of a positron and a neutrino.
Sum of all the energy forms before a condition equals the sum of all the energy forms after the condition.


46. Which kind of lens always has a virtual image?
When it is on the 'dark' side of the mirror. Opposite the light.
kg•m/s
Diverging
the refracted ray bends TOWARDS the normal line.


47. What is the difference between atomic number and atomic mass number?
They fall - vertically - the by the same amount in the same time.
m=(rho)V
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
The force is perpendicular to the motion. This always results in a curved path. (Open right hand rule)


48. What direction controls time in falling body and projectile motion problems?
Joule
kg•m/s
Vertical direction
The force is perpendicular to the motion. This always results in a curved path. (Open right hand rule)


49. Formula for the potential difference of a point charge as compared to infinity.
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
V=kq/R
Diverging lenses have a negative focal length.
N•m


50. What conservation law dictates that the frequency of light cannot change as it travels between mediums?
Conservation of Energy ... because E=hf
N•m
The NET work BY a system is the area enclosed in a cycle on a PV diagram.
KE = (3/2)kT