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 path of a charged particle in a magnetic field?
(1) The image is larger than the object: ho>hi. (2) image is upright.
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2
W=qV where 'W' is the work - 'q' is the charge and 'V' is the potential difference measured in Volts.
The particle travels in a circle. Radius=momentum/qB

2. What is the energy equation if a force (friction) through a distance results in heat and thus a change in temperature?
KE=Work
Bernoulli's equation - Flow Rate = Volume/time
The centripetal force points along the radius towards the center of the circle.
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet

3. This is the gauge pressure when under water.
(rho)gh
According to Coulomb's Law - the new force is 6/4 times the old charge.
E=hf=hc/(wavelength)
dU = zero. The change in temperature of the gas is zero.

4. What is an object placed when the distance between it and the mirror is positive?
In front of the mirror - in the light.
Adding the momentum of all the bodies.
The force is perpendicular to the motion. This always results in a curved path. (Open right hand rule)
Initial velocity

5. The speed of a ball when it lands at the same height it was thrown from.
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.
Sum of all the energy forms before a condition equals the sum of all the energy forms after the condition.
The motion of the molecules in gas.
Initial velocity

6. In a pendulum or spring - what are the displacement - velocity - PE and KE at the equilibrium position?
Work of a system is equal to 1-Qc/Qh
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.
Displacement is zero because it is measured from equilibrium position. KE and velocity are at a maximum and it is the lowest point so PE due to gravity is at zero.
How quickly you change velocity.

7. S.I. unit of torque
N•m
Work is positive when the force and displacement point in the same direction.
Zero.
The initial velocity - (Vo in the formulas)

8. S.I. unit of magnetism
Vertical direction
Tesla
Every point on a wave front is a secondary source.
W=qV where 'W' is the work - 'q' is the charge and 'V' is the potential difference measured in Volts.

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

10. How does the speed change when the pressure is decreased?
kg•m/s
The volume under water
Broad bright spot in the middle and alternating dark and light spots to the sides.
Speed ups

11. How does thickness effect resistance?
It is the net force pointing towards the center.
The thicker the wire - the lower the resistance.
Diverging
convex mirrors are diverging mirrors.

12. What does the pattern look like in a Young's Double Slit diffraction pattern?
No image.
The release of an electron and antineutrino or the release of a positron and a neutrino.
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.
Dark in the middle and alternating light and dark spots after that.

13. 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?
Resistance: R=R1+R2+R3+...
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.
The electric force (Coulomb's Law) can attract and repel and it depends on charge. Universal Gravity depends on mass and always attracts.
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.

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

15. Under what conditions is heat positive?

16. What kind of mirror has a positive focus?
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
Concave
Break it up into x and y components using trig - add up the components.
convex mirrors are diverging mirrors.

17. Electric force felt by a charge due to another charge.
F=kq1q2/R^2
ZERO
A potential difference and a flow and energized charges.
Diverging

18. What does upward slope on a displacement versus time graph imply about the velocity.
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
The velocity is positive
Only 1/2 a wavelength fits in the tube. L=wavelength/2
Impulse

19. S.I. unit of momentum
kg•m/s
Torque
They fall - vertically - the by the same amount in the same time.
Current stays the same for resistors in series.

20. What is the component of 'mg' parallel to a slope?
Work is the change in kinetic energy. Work transfers energy to and from a body
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
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
(mg)sin(angle)

21. Define reflection
The bouncing of light
'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.
The light travels through the image.
Change in voltage across the resistor or capacitor.

22. How must the mediums light is traveling through be arranged so that the condition for the critical angle can exist?
The CHANGE in velocity.
Conservation of Energy ... because E=hf
Light must travel from more to less dense so the refracted ray can bend away from the normal.
Sum of all the energy forms before a condition equals the sum of all the energy forms after the condition.

23. What is the derived equation for the ACCELERATION of gravity in terms of m and 'r' squared?
They fall - vertically - the by the same amount in the same time.
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2
The electric force (Coulomb's Law) can attract and repel and it depends on charge. Universal Gravity depends on mass and always attracts.
frequency (Think of the color as not changing.)

24. S.I. unit of flux
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet
Newton
Weber
velocity

25. What kind of image do you get when the object is placed at the focus?
No image.
It is the time for 1/2 a substance to decay by radioactive processes.
The centripetal acceleration points along the radius towards the center of the circle. (Just like the centripetal force.)
Ohm's Law: V=IR

26. What is implied when an object is not accelerating in the y direction?
The movement of charges is the current and it is measures by the number of charges per second at a point.
Dark in the middle and alternating light and dark spots after that.
The particle travels in a circle. Radius=momentum/qB
g=zero so h=(Vyo)t

27. What is the derived equation for the electric field in terms of q and r^2 ?

28. When is the image negative for mirrors?

29. What is the area under the velocity time graph?
Vy=Vyo + gt ...Watch the signs.
Displacement
Resistance: R=R1+R2+R3+...
Conservation of Energy ... because E=hf

30. What are the three rules needed for mirrors - since not all three work every time?
The body is moving at a constant velocity
(1) Bounced off the vertex. (2) Parallel the through the focus. (3) Through the focus and parallel.
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
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.

31. What shape is a diverging lenses?
When a body is moving at a constant velocity or not moving at all.
The body is moving at a constant velocity
W=qV
Lenses that are thinner in the middle than on the edges.

32. What is meant by the terms system and environment?
The charge on each capacitor.
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.
It is the time for 1/2 a substance to decay by radioactive processes.
system is the gas being studied. Environment is the surroundings outside the gas.

33. How is tube length and wavelength related for a tube that is closed on ONE end?
Statistically speaking - energy flows from hot to cold.
E=hf=hc/(wavelength)
The electron
Only 1/4 wavelength fits in the tube. L=wavelength/4

34. When is the image negative for a lens?
When it is on the same side as the image?
KE = (3/2)kT
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.

35. How is the centripetal force represented in a free body diagram?
A potential difference and a flow and energized charges.
It is the net force pointing towards the center.
The electric force (Coulomb's Law) can attract and repel and it depends on charge. Universal Gravity depends on mass and always attracts.
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet

36. What are the two forms of the ideal gas law?
The release of an electron and antineutrino or the release of a positron and a neutrino.
The charge on each capacitor.
PV=nRT and PV=kT
W=qV where 'W' is the work - 'q' is the charge and 'V' is the potential difference measured in Volts.

37. What comprises gamma decay?
Work by a system is negative when the gas contracts. (The volume decreases.)
The release of an energetic photon from an overly excited molecule.
Conservation of Energy ... because E=hf
Open right hand rule

38. What shapes are converging lenses?
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
Lenses that are fatter in the middle than on the edges.
Pascal
V=kq/R

39. S.I. unit of work
Joule
The body is moving at a constant velocity
They fall - vertically - the by the same amount in the same time.
Convex

40. When are f - p - q - ho - hi - and M positive for mirrors?
When the object is beyond the focus for a concave mirror.
Newton
But placing more obstacles in the path of the charge's flow.
frequency (Think of the color as not changing.)

41. What does the term electric potential energy mean?
Electric potential is the potential energy associated with the electric force F=qE
(Cross-sectional Area)(Velocity)
Only 1/2 a wavelength fits in the tube. L=wavelength/2
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.

42. Which type of lenses have a NEGATIVE focal length?
DU = Q+W ...dU:of the environment = Q:from the environment + W:by the environment
Entropy always increases.
According to Coulomb's Law - the new force is 6/4 times the old charge.
Diverging lenses have a negative focal length.

43. What is the formula relating emf and voltage?
(n1)sin(theta1) = (n2)sin(theta2)
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
system is the gas being studied. Environment is the surroundings outside the gas.
(1) Bounced off the vertex. (2) Parallel the through the focus. (3) Through the focus and parallel.

44. What is heat?
Newton
The transfer of thermal energy
Transverse waves: The displacement is perpendicular to the wave's motion. Longitudinal waves: The displacement is in the direction of the wave's motion.
F=kq1q2/R^2

45. What is the energy equation if you see a height difference between two points in the problem?
The centripetal force points along the radius towards the center of the circle.
N/C
KE=(3/2)kT where k is Boltzman's constant
Potential energy stored in gravity (PE = mgh)

46. Under what conditions is heat negative?

47. What is the relationship that describes the rate that work is done - or that energy is used?
Velocity has a direction and speed does not have direction.
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.
Power ... Power equals the change in energy over time.
Dark in the middle and alternating light and dark spots after that.

48. What shape is a converging mirrors?
V=kq/R
Pascal
It is the time for 1/2 a substance to decay by radioactive processes.
Concave mirrors are converging mirrors.

49. What is the difference between reflection - refraction - and diffraction?
Reflection is the bouncing of waves. Refraction is the bending of waves. Diffraction bends waves around small objects and causes interference from a coherent sources.
The body is moving at a constant velocity
Entropy always increases.
It is the net force pointing towards the center.

50. What is the difference between a motor and a generator?
m=(rho)V
Impulse is the change in momentum
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
An adiabatic process is where no thermal energy is transfered between the system and its surroundings.