AP Physics

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 the derived equation for the ACCELERATION of gravity in terms of m and 'r' squared?
Pgh ..thats ('rho')(gravity's acceleration)(height)
Convex
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2
Vy=Vyo + gt ...Watch the signs.


2. What is the law of reflection?
ZERO. Because the force is perpendicular to the displacement . (Open right hand rule.)
Concave
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.
The charge on each capacitor.


3. What are 2 key differences between electric force and gravitational force?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


4. Work is the area under which curve?
When it is on the same side as the image?
The graph of force vs displacement
Lost kinetic energy is work. It is calculated from Fd or KE:final - KE:initial
Break it up into x and y components using trig - add up the components.


5. How does temperature effect resistance?
When it is on the same side as the image?
Heat - (the 'Q' variable) - is NEGATIVE when thermal energy is being REMOVED from a system.
The electric force (Coulomb's Law) can attract and repel and it depends on charge. Universal Gravity depends on mass and always attracts.
The higher the temperature the higher the resistance. They are proportional to each other.


6. S.I. unit of magnetism
Tesla
The volume under water
Newton
When the object is beyond the focus for a concave mirror.


7. How is the net work of a system (gas) measured?
Concave mirrors are converging mirrors.
The NET work BY a system is the area enclosed in a cycle on a PV diagram.
Joule
E=kq/r^2 This is the electric field's magnitude at a point in space.


8. What makes an image 'real?'
The light travels through the image.
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
It is when a nucleon changes properties. Like a neutron changing into a proton.
V=kq/R


9. The speed of a ball when it lands at the same height it was thrown from.
The engine's efficiency is 1-Tc/Th. It is defined by the temperature's in the reservoirs and not the thermal energy flowing from them.
Electric potential is the potential energy associated with the electric force F=qE
Initial velocity
x=(1/2)at^2 Remember - the word 'dropped' implies no initial velocity.


10. What is implied when an object is not accelerating in the y direction?
The motion of the molecules in gas.
Vx=(Vxo)t ...Recall that there is no acceleration in the horizontal direction.
g=zero so h=(Vyo)t
V=kq/R


11. What is the y intercept of the velocity time graph?
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.
The initial velocity - (Vo in the formulas)
dU = zero. The change in temperature of the gas is zero.
W = KE:final - KE:initial


12. What comprises beta radiation?
The release of an electron and antineutrino or the release of a positron and a neutrino.
Converging lenses have a positive focal length.
It is the net force pointing towards the center.
Zero. Because the displacement is perpendicular to the force (centripetal force.)


13. How is sum of force (net force) depicted in a free body diagram?
Statistically speaking - energy flows from hot to cold.
Light must travel from more to less dense so the refracted ray can bend away from the normal.
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
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.


14. How much work is the work done on an object moving in a circle? Why?
Provided experimental proof of the wave property of light.
Change in voltage across the resistor or capacitor.
Zero. Because the displacement is perpendicular to the force (centripetal force.)
Joule


15. Which type of radiation has the highest energy?
Radio - Infrared - Visible - UltraViolet - X-Rays - Gamma Rays.
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.
The refracted light ray is bent 90°. (Parallel to the interface surface.)
Gamma


16. What is the second law of thermodynamics?
the refracted ray bends TOWARDS the normal line.
KE=(3/2)kT where k is Boltzman's constant
Statistically speaking - energy flows from hot to cold.
The bouncing of light


17. What is temperature?
Joule
That the orbits of the electrons are like planets around the Sun.
The volume under water
The measure of the average kinetic energy of the molecules.


18. What is the Bohr Model of the atom?
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.
Entropy always increases.
That the orbits of the electrons are like planets around the Sun.
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.


19. S.I. unit of work
E=hf ...E=energy of a single photon (J) - h = Plank's constant - f=frequency (Hz)
Every point on a wave front is a secondary source.
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.
Joule


20. How does thickness effect resistance?
The light travels through the image.
Bends waves around small objects and the interference of waves from a coherent sources.
The thicker the wire - the lower the resistance.
E=hf


21. What is acceleration?
The volume under water
How quickly you change velocity.
Zero. Because the displacement is perpendicular to the force (centripetal force.)
Tesla


22. What is the name given to the distance between the pivot point and applied perpendicular force?
That the orbits of the electrons are like planets around the Sun.
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.
F=kq1q2/R^2
Moment arm


23. Under what conditions is work by a system ( gas) negative?
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
m^3/s
Work by a system is negative when the gas contracts. (The volume decreases.)
The centripetal force is the net force. It's magnitude is calculated from F=ma where 'a' is the centripetal force.


24. What equation describes the speed of a dropped object 't' seconds after it started moving?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


25. What is conservation of energy and what is its significance?
Potential difference is the change in energy of a charged particle divided by its charge.
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.
'q' is a single particle's charge and 'Q' is the sum of all the charges. Q=q1+q2+q3+q4...
Sum of all the energy forms before a condition equals the sum of all the energy forms after the condition.


26. How length effect resistance?
The longer the length of wire - the higher the resistance.
Convex
The engine's efficiency is 1-Tc/Th. It is defined by the temperature's in the reservoirs and not the thermal energy flowing from them.
Magnitude and direction


27. What does light absorption involve?
N/C
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.
Potential energy stored in gravity (PE = mgh)
Potential difference is the change in energy of a charged particle divided by its charge.


28. How can you tell when an engine is a Carnot Engine?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


29. What is a key requirement in order for work to be done?
wave speed = (wavelength)(frequency)
A displacement must occur. ( W=Fd)
Work by a system is positive when the gas expands. (The volume increases.)
E=kq/r^2 This is the electric field's magnitude at a point in space.


30. What did Rutherford discover?
The nucleus
N/C
Break it up into x and y components using trig - add up the components.
Broad bright spot in the middle and alternating dark and light spots to the sides.


31. What is force times the perpendicular distance?
Torque
Diverging
Potential energy stored in gravity (PE = mgh)
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.


32. Formula for the potential difference of a point charge as compared to infinity.
system is the gas being studied. Environment is the surroundings outside the gas.
The release of a Helium nuclei - 4 -2 He2+
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.
V=kq/R


33. Formula for the electric field at point in space for a single point charge.
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.
x=Vo + ((1/2)g)sin(angle)t^2
The movement of charges is the current and it is measures by the number of charges per second at a point.
E=kq/R^2


34. How is tube length and wavelength related for a tube that is closed on ONE end?
Zero.
Conservation of Energy ... because E=hf
Only 1/4 wavelength fits in the tube. L=wavelength/4
Power ... Power equals the change in energy over time.


35. Unit of energy for electricity.
V - a Joule/Coulomb
W=qV
Atmospheric pressure
2(pi)R/T ...Circumference/Period


36. S.I. unit of torque
The electric field forces charges to move.
ZERO
N•m
The body is moving at a constant velocity


37. What is its impact on the first law of thermodynamics of an adiabatic process?
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2
Convex
Q=0 because thermal energy is not transfered between the system and its surroundings
Pgh ..thats ('rho')(gravity's acceleration)(height)


38. What is internal energy?
Only 1/4 wavelength fits in the tube. L=wavelength/4
The motion of the molecules in gas.
Convex
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.


39. 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?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


40. A ball rolls inside a salad bowl. The ball is released along the top edge and rolls down before climbing to the same height on the opposite side of the bowl. What is the direction of the acceleration of the ball when it at the bottom of the bowl?
W = KE:final - KE:initial
The acceleration is towards the center. It is supplied by the normal force and points towards the center.
The initial velocity - (Vo in the formulas)
Lenses that are fatter in the middle than on the edges.


41. What is the difference between emf and voltage?
(Cross-sectional Area)(Velocity)
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.
the refracted ray bends TOWARDS the normal line.
The centripetal force is the net force. It's magnitude is calculated from F=ma where 'a' is the centripetal force.


42. How does a wires composition effect resistance?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


43. Formula for the electric field between a pari of charged plates.
E=V/d
Work is positive when the force and displacement point in the same direction.
Velocity has a direction and speed does not have direction.
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.


44. When light travels from MORE dense to LESS dense mediums - how does the refracted ray bend in relation to the normal line?
Electromagnetic induction is the generation of an Emf by moving a conductor through a magnetic field. emf=change in flux/dt
According to Coulomb's Law - the new force is 6/4 times the old charge.
the refracted ray bends AWAY from the normal line.
Gamma


45. What do you know about two objects that are launched at different horizontal velocities?
They fall - vertically - the by the same amount in the same time.
(mg)sin(angle)
x=(1/2)at^2 Remember - the word 'dropped' implies no initial velocity.
F=kq1q2/R^2


46. Formula for work by a car that changes speed on a horizontal road.
Energy and mass are equated by E=mc^2.
The acceleration is towards the center. It is supplied by the normal force and points towards the center.
W = KE:final - KE:initial
Current stays the same for resistors in series.


47. What kind of image do you get when the object is placed at the focus?
Work
No image.
The release of a Helium nuclei - 4 -2 He2+
Joule


48. What does upward slope on a displacement versus time graph imply about the velocity.
The velocity is positive
But placing more obstacles in the path of the charge's flow.
No image.
The particle travels in a circle. Radius=momentum/qB


49. What kind of mirror has a positive focus?
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
Concave
No image.
Same number of protons by a different number of neutrons. e.g. Carbon-12 versus Carbon-14


50. Which type of radiation has the lowest energy?
(rho)gh
The particle travels in a circle. Radius=momentum/qB
Diverging lenses have a negative focal length.
Alpha