Test your basic knowledge |

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 electric field's magnitude inside of a container made from an electrical INSULATOR?
ZERO
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.
Work
Something other than zero.

2. Which type of radiation has the highest energy?
Power ... Power equals the change in energy over time.
Newton
Lenses that are fatter in the middle than on the edges.
Gamma

3. What is the order of the visible range electromagnetic spectrum?
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet
Alpha
Impulse is the change in momentum
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2

4. What is half life?
Work done 'BY' the gas.
Convex
It is the time for 1/2 a substance to decay by radioactive processes.
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.

5. What two things must be true for a positive magnification?
m=(rho)V
The energy required to remove an electron or nucleon from a molecule.
(1) The image is larger than the object: ho>hi. (2) image is upright.
Kinetic energy is conserved for an elastic collision and not for an inelastic collision. ELASTIC: m1v1 + m2v2 = m1v1'+m1v2': INELASTIC: m1v1 + m2v2 = (m1+m1)v

6. What does the pattern look like in a Young's Single Slit diffraction pattern?
A displacement must occur. ( W=Fd)
No image.
Broad bright spot in the middle and alternating dark and light spots to the sides.
'q' is a single particle's charge and 'Q' is the sum of all the charges. Q=q1+q2+q3+q4...

7. What is an object placed when the distance between it and the mirror is positive?
The body is moving at a constant velocity
Resistance: R=R1+R2+R3+...
In front of the mirror - in the light.
The work function is a minimum amount of energy needed to release a photon from a collection in the surface of a material. The ionization energy is the energy needed to release an electron from a single - free-floating - molecule. the ionization ener

8. What is the photoelectric effect?
Velocity has a direction and speed does not have direction.
It is the release of photoelectrons released by photons with an energy (E=hf) above the work function.
P=IV
g=zero so h=(Vyo)t

9. When is the image negative for mirrors?

10. What is the Bohr Model of the atom?
wave speed = (wavelength)(frequency)
That the orbits of the electrons are like planets around the Sun.
The centripetal acceleration points along the radius towards the center of the circle. (Just like the centripetal force.)
Torque

11. S.I. unit of flux
x=Vo + ((1/2)g)sin(angle)t^2
Transverse waves: The displacement is perpendicular to the wave's motion. Longitudinal waves: The displacement is in the direction of the wave's motion.
Weber
KE = (3/2)kT

12. What is force times the perpendicular distance?
m^3/s
Torque
the refracted ray bends AWAY from the normal line.
(1) Bounced off the vertex. (2) Parallel the through the focus. (3) Through the focus and parallel.

13. How does impulse relate to force?
Adding the momentum of all the bodies.
Impulse is (force)(time)
Potential difference is the change in energy of a charged particle divided by its charge.
The body is moving at a constant velocity

14. How much work is the work done on an object moving in a circle? Why?
Kinetic energy is conserved for an elastic collision and not for an inelastic collision. ELASTIC: m1v1 + m2v2 = m1v1'+m1v2': INELASTIC: m1v1 + m2v2 = (m1+m1)v
E=hf=hc/(wavelength)
Zero. Because the displacement is perpendicular to the force (centripetal force.)
Provided experimental proof of the wave property of light.

15. Flow Rate
(Cross-sectional Area)(Velocity)
kg•m/s
wave speed = (wavelength)(frequency)
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.

16. The speed of a ball when it lands at the same height it was thrown from.
frequency (Think of the color as not changing.)
Initial velocity
(1) Bounced off the vertex. (2) Parallel the through the focus. (3) Through the focus and parallel.
2(pi)R/T ...Circumference/Period

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

18. Continuity equation
It is the time for 1/2 a substance to decay by radioactive processes.
Joule
A1v1=a2v2
The acceleration is towards the center. It is supplied by the normal force and points towards the center.

19. This is the gauge pressure when under water.
(rho)gh
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.
The volume under water
Bends waves around small objects and the interference of waves from a coherent sources.

20. What equation describes the distance that a dropped object falls 't' seconds after it started moving?

21. What do you know about two objects that are launched at different horizontal velocities?
'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.
They fall - vertically - the by the same amount in the same time.
An adiabatic process is where no thermal energy is transfered between the system and its surroundings.
W = KE:final - KE:initial

22. What is the difference between a motor and a generator?
Work by a system is negative when the gas contracts. (The volume decreases.)
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
Newton
velocity

23. What is mass energy equivalence?
system is the gas being studied. Environment is the surroundings outside the gas.
Energy and mass are equated by E=mc^2.
Force= Pressure/Area
The refracted light ray is bent 90°. (Parallel to the interface surface.)

24. Unit that means the same thing as Nm
Joule
Newton
'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.
Zero.

25. Which type of lenses have a POSITIVE focal length?
Displacement
A change in the gas' temperature.
Converging lenses have a positive focal length.
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.

26. The 'V' is (rho)Vg
The thicker the wire - the lower the resistance.
Radio - Infrared - Visible - UltraViolet - X-Rays - Gamma Rays.
Work by a system is negative when the gas contracts. (The volume decreases.)
The volume under water

27. What does upward slope on a displacement versus time graph imply about the velocity.
The thicker the wire - the lower the resistance.
The velocity is positive
m^3/s
The initial velocity - (Vo in the formulas)

28. What is needed for electromagnetic induction to occur?
E=hf=hc/(wavelength)
Weight ...w=mg
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.
How quickly you change velocity.

29. Formula for the electric field between a pari of charged plates.
They fall - vertically - the by the same amount in the same time.
(rho)gh
E=V/d
Lenses that are thinner in the middle than on the edges.

30. When is the image negative for a lens?
When it is on the same side as the image?
Entropy always increases.
Concave mirrors are converging mirrors.
Resistance: R=R1+R2+R3+...

31. What is the formula relating emf and voltage?
Work is the change in kinetic energy. Work transfers energy to and from a body
E=kq/r^2 This is the electric field's magnitude at a point in space.
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
Initial velocity

32. What does light absorption involve?
The bending of light
Weight ...w=mg
The force is perpendicular to the motion. This always results in a curved path. (Open right hand rule)
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.

33. S.I. unit of pressure
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
The work function is a minimum amount of energy needed to release a photon from a collection in the surface of a material. The ionization energy is the energy needed to release an electron from a single - free-floating - molecule. the ionization ener
Open right hand rule
Pascal

34. What conditions are necessary to change the reflected ray's phase by 180°?

35. What do you do with any vector that is not on either the x or y axis?
Break it up into x and y components using trig - add up the components.
Impulse is the change in momentum
E=V/d
The velocity is positive

36. What is the relationship between energy - frequency - and wavelength in any wave?
2(pi)R/T ...Circumference/Period
E=hf=hc/(wavelength)
Work is positive when the force and displacement point in the same direction.
Provided experimental proof of the wave property of light.

37. S.I. unit of momentum
Every point on a wave front is a secondary source.
kg•m/s
Radio - Infrared - Visible - UltraViolet - X-Rays - Gamma Rays.
The particle travels in a circle. Radius=momentum/qB

38. What is the 1st law of thermodynamics as applied to gases?
Moment arm
Potential difference is the change in energy of a charged particle divided by its charge.
How quickly you change velocity.
DU = Q+W ...dU:of the environment = Q:from the environment + W:by the environment

39. Define mass in terms of density.
m=(rho)V
wave speed = (wavelength)(frequency)
Impulse
x=Vo + ((1/2)g)sin(angle)t^2

40. How is the force on a charged particle in a magnetic field creating the path calculated?
E=hf
The force is perpendicular to the motion. This always results in a curved path. (Open right hand rule)
convex mirrors are diverging mirrors.
When a body is moving at a constant velocity or not moving at all.

41. How is tube length and wavelength related for a tube that is opened on both ends?
Only 1/2 a wavelength fits in the tube. L=wavelength/2
It is the time for 1/2 a substance to decay by radioactive processes.
When it is on the 'dark' side of the mirror. Opposite the light.
KE=(3/2)kT where k is Boltzman's constant

42. What equation describes the distance that a horizontally launched projectile falls t seconds after it started moving?
The release of a Helium nuclei - 4 -2 He2+
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.
Atmospheric pressure
THe force that holds the nucleus together.

43. How does the speed change when the pressure is decreased?
When the object is beyond the focus for a concave mirror.
E=hf=hc/(wavelength)
x=(1/2)at^2 Remember - the word 'dropped' implies no initial velocity.
Speed ups

44. What doesn't change (speed - frequency - or wavelength) - when light moves from one medium to another?
'q' is a single particle's charge and 'Q' is the sum of all the charges. Q=q1+q2+q3+q4...
Torque
frequency (Think of the color as not changing.)
It is the net force pointing towards the center.

45. What is the relationship that describes the rate that work is done - or that energy is used?
The bending of light
The graph of force vs displacement
F=qE
Power ... Power equals the change in energy over time.

46. What are the differences and similarities between transverse and longitudinal waves?

47. What did Thompson discover?
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.
the refracted ray bends TOWARDS the normal line.
Power ... Power equals the change in energy over time.
The electron

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

49. What is the relationship between power - voltage and current?
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.
Weight ...w=mg
The force is perpendicular to the motion. This always results in a curved path. (Open right hand rule)
P=IV

50. What is the name given to the distance between the pivot point and applied perpendicular force?
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
Moment arm
The volume under water
N•m