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. Force in terms of pressure
system is the gas being studied. Environment is the surroundings outside the gas.
The velocity is positive
Newton
Force= Pressure/Area

2. What is the difference between the variable 'q' and 'Q?'?

3. What is the energy equation if you see a height difference between two points in the problem?
x=Vo + ((1/2)g)sin(angle)t^2
ZERO. Because the force is perpendicular to the displacement . (Open right hand rule.)
Potential energy stored in gravity (PE = mgh)
Potential difference is the change in energy of a charged particle divided by its charge.

4. What is the general equation for motion down a slope and how does it change if the object is going up the slope?
x=Vo + ((1/2)g)sin(angle)t^2
It is when a nucleon changes properties. Like a neutron changing into a proton.
Joule
g=zero so h=(Vyo)t

5. This is used to determine the speed of a fluid when the pipe slopes up or down.

6. What is heat?
It is used in Lenz's Law to determine the change in flux of a conductor.
The transfer of thermal energy
Change in voltage across the resistor or capacitor.
Initial velocity

7. Under what conditions is mechanical work negative?
Diverging lenses have a negative focal length.
Work is positive when the force and displacement point in the same direction.
The NET work BY a system is the area enclosed in a cycle on a PV diagram.
Impulse is the change in momentum

8. What is an isothermal process - and what is its impact on the first law of thermodynamics?
The PVT conditions change for a gas without changing the temperature.
Zero.
KE=(3/2)kT where k is Boltzman's constant
The volume under water

9. What did Rutherford discover?
Something other than zero.
Obstacles in the path of the flow of charges.
The nucleus
Work

10. What is the relationship that describes the rate that work is done - or that energy is used?
Parallel. Because the plates are shared.
Power ... Power equals the change in energy over time.
convex mirrors are diverging mirrors.
The longer the length of wire - the higher the resistance.

11. S.I. Unit of electric force
E=V/d
Obstacles in the path of the flow of charges.
Pascal
Newton

12. What is the y intercept of the velocity time graph?
The initial velocity - (Vo in the formulas)
According to Coulomb's Law - the new force is 6/4 times the old charge.
Alpha
V - a Joule/Coulomb

13. What is the potential energy of a charge in an electric field?
Pgh ..thats ('rho')(gravity's acceleration)(height)
V=kq/R
Electromagnetic wave exits the electrons to a higher orbital. When the electron relaxes - a wavelength of light is given off.
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. What quantity is calculated from slope of the displacement versus time graph?
Electromagnetic wave exits the electrons to a higher orbital. When the electron relaxes - a wavelength of light is given off.
Parallel. Because the plates are shared.
An adiabatic process is where no thermal energy is transfered between the system and its surroundings.
velocity

15. S.I. unit of centripetal force
Newton
E=hf ...E=energy of a single photon (J) - h = Plank's constant - f=frequency (Hz)
Gamma
P=IV

16. S.I. unit of flux
An adiabatic process is where no thermal energy is transfered between the system and its surroundings.
E=hf
Concave mirrors are converging mirrors.
Weber

17. What equation describes the distance that a horizontally launched projectile falls t seconds after it started moving?
Newton
Zero.
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.
The acceleration is towards the center. It is supplied by the normal force and points towards the center.

18. What do the period of pendulums and springs each depend on?
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.
Velocity has a direction and speed does not have direction.
The motion of the molecules in gas.
The volume under water

19. S.I. unit of power
Watt
Ohm's Law: V=IR
Impulse
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

20. What kind of mirror has a positive focus?
Force lifting a body when it is in a fluid.
Concave
No image.
Light must travel from more to less dense so the refracted ray can bend away from the normal.

21. What are the two rules for ray tracing in lenses that work all the time?
Joule
When it is on the 'dark' side of the mirror. Opposite the light.
(1) Straight through the vertex. (2) Parallel then through the primary focus.
Force lifting a body when it is in a fluid.

22. S.I. unit of work
When it is on the 'dark' side of the mirror. Opposite the light.
The velocity is positive
2(pi)R/T ...Circumference/Period
Joule

23. How do you find the number of neutrons in an atom?
Potential energy stored in gravity (PE = mgh)
The particle travels in a circle. Radius=momentum/qB
It is used in Lenz's Law to determine the change in flux of a conductor.
Atomic mass number minus atomic number.

24. Which kind of mirror always has a virtual image?
KE=Work
Convex
The nucleus
Dark in the middle and alternating light and dark spots after that.

25. Formula for the electric force felt by a charged particle in an electric field.
F=qE
E=hf ...E=energy of a single photon (J) - h = Plank's constant - f=frequency (Hz)
m=(rho)V
The release of a Helium nuclei - 4 -2 He2+

26. State the significance of Young's Experiment.
Sum of all the energy forms before a condition equals the sum of all the energy forms after the condition.
Something other than zero.
The release of an energetic photon from an overly excited molecule.
Provided experimental proof of the wave property of light.

27. What is the difference between elastic and inelastic collisions? State the relevant equations for each.

28. Which type of radiation has the lowest energy?
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.
Alpha
m=(rho)V
A displacement must occur. ( W=Fd)

29. How does impulse relate to force?
Adding the momentum of all the bodies.
Work is positive when the force and displacement point in the same direction.
Impulse is (force)(time)
'q' is a single particle's charge and 'Q' is the sum of all the charges. Q=q1+q2+q3+q4...

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

31. What is the Bohr Model of the atom?
Initial velocity
That the orbits of the electrons are like planets around the Sun.
Electromagnetic wave exits the electrons to a higher orbital. When the electron relaxes - a wavelength of light is given off.
Weight ...w=mg

32. How length effect resistance?
The longer the length of wire - the higher the resistance.
E=hf
ZERO
(n1)sin(theta1) = (n2)sin(theta2)

33. What is meant by the terms system and environment?
The longer the length of wire - the higher the resistance.
When the body rests on a surface.
E=hf ...E=energy of a single photon (J) - h = Plank's constant - f=frequency (Hz)
system is the gas being studied. Environment is the surroundings outside the gas.

34. What does light emission involve?
(1) Bounced off the vertex. (2) Parallel the through the focus. (3) Through the focus and parallel.
Electromagnetic wave exits the electrons to a higher orbital. When the electron relaxes - a wavelength of light is given off.
Current stays the same for resistors in series.
Speed ups

35. What is ionization energy and how does it compare to the work function?
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.
The nucleus
Gamma
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

36. What does the term electric potential energy mean?
Electromagnetic induction is the generation of an Emf by moving a conductor through a magnetic field. emf=change in flux/dt
Conservation of Energy ... because E=hf
Electric potential is the potential energy associated with the electric force F=qE
frequency (Think of the color as not changing.)

37. S.I. unit of gravitational force
Current stays the same for resistors in series.
Zero. Because the displacement is perpendicular to the force (centripetal force.)
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.
Newton

38. Formula for work by a car that changes speed on a horizontal road.
KE=(3/2)kT where k is Boltzman's constant
When it is on the same side as the image?
V=kq/R
W = KE:final - KE:initial

39. What stays the same for resistors or capacitors in parallel?
Force= Pressure/Area
The bouncing of light
Change in voltage across the resistor or capacitor.
Impulse is (force)(time)

40. What is the area under the acceleration versus time graph?
Force= Pressure/Area
Every point on a wave front is a secondary source.
The CHANGE in velocity.
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)

41. What does light absorption involve?
Diverging lenses have a negative focal length.
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.
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.

42. What is the law of reflection?
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.
Work done 'BY' the gas.
Statistically speaking - energy flows from hot to cold.
The volume under water

43. Which kind of mirror cannot magnify an image?
Something other than zero.
The charge on each capacitor.
Convex
Newton

44. Give an example of a transverse and a longitudinal wave.

45. Formula for the potential difference of a point charge as compared to infinity.
DU = Q+W ...dU:of the environment = Q:from the environment + W:by the environment
V=kq/R
Power ... Power equals the change in energy over time.
The CHANGE in velocity.

46. What is the formula relating emf and voltage?
A1v1=a2v2
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
The initial velocity - (Vo in the formulas)
Impulse

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

48. What is force times time?
Impulse
N/C
But placing more obstacles in the path of the charge's flow.
(n1)sin(theta1) = (n2)sin(theta2)

49. What is needed for electromagnetic induction to occur?
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.
Zero. Because the displacement is perpendicular to the force (centripetal force.)
(Cross-sectional Area)(Velocity)
The transfer of thermal energy

50. Define diffraction
Diverging lenses have a negative focal length.
Lost kinetic energy is work. It is calculated from Fd or KE:final - KE:initial
Convex
Bends waves around small objects and the interference of waves from a coherent sources.