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 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.
Bends waves around small objects and the interference of waves from a coherent sources.
Work is the change in kinetic energy. Work transfers energy to and from a body
The volume under water


2. Which kind of mirror always has a virtual image?
wave speed = (wavelength)(frequency)
m^3/s
Convex
Work


3. The speed of a ball when it lands at the same height it was thrown from.
E=kq/r^2 This is the electric field's magnitude at a point in space.
(1) Straight through the vertex. (2) Parallel then through the primary focus.
The charge on each capacitor.
Initial velocity


4. What shape is a converging mirrors?
the refracted ray bends TOWARDS the normal line.
Concave mirrors are converging mirrors.
dU = zero. The change in temperature of the gas is zero.
Work of a system is equal to 1-Qc/Qh


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

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6. What direction controls time in falling body and projectile motion problems?
V - a Joule/Coulomb
frequency (Think of the color as not changing.)
Vertical direction
Light must travel from more to less dense so the refracted ray can bend away from the normal.


7. Work is the area under which curve?
Power ... Power equals the change in energy over time.
The graph of force vs displacement
g=zero so h=(Vyo)t
Lenses that are fatter in the middle than on the edges.


8. Define reflection
Bernoulli's equation - Flow Rate = Volume/time
Work is positive when the force and displacement point in the same direction.
The bouncing of light
m=(rho)V


9. Average kinetic energy of an ideal gas's SINGLE molecule.
Break it up into x and y components using trig - add up the components.
KE = (3/2)kT
The release of a Helium nuclei - 4 -2 He2+
(1) The image is larger than the object: ho>hi. (2) image is upright.


10. Under what conditions is heat negative?

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11. What is impulse?
Newton
x=(1/2)at^2 Remember - the word 'dropped' implies no initial velocity.
Alpha
Impulse is the change in momentum


12. Flow Rate
Speed ups
Lenses that are thinner in the middle than on the edges.
(Cross-sectional Area)(Velocity)
N/C


13. What do the period of pendulums and springs each depend on?
The initial velocity - (Vo in the formulas)
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.
Lenses that are thinner in the middle than on the edges.
The graph of force vs displacement


14. What equation describes the speed in the y-direction of a projectile 't' seconds after it started moving?
The electron
Vy=Vyo + gt ...Watch the signs.
A displacement must occur. ( W=Fd)
The release of an electron and antineutrino or the release of a positron and a neutrino.


15. What do batteries and generators produce?
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.
In front of the mirror - in the light.
A potential difference and a flow and energized charges.
system is the gas being studied. Environment is the surroundings outside the gas.


16. How much work is the work done on an object moving in a circle? Why?
E=kq/R^2
When the body rests on a surface.
Zero. Because the displacement is perpendicular to the force (centripetal force.)
Current stays the same for resistors in series.


17. What is the derived equation for the ACCELERATION of gravity in terms of m and 'r' squared?
Joule
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
F=qE


18. Formula for work as a charged particle travels across two charged plates
W=qV
Force= Pressure/Area
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.
Work of a system is equal to 1-Qc/Qh


19. What is a key requirement in order for work to be done?
A displacement must occur. ( W=Fd)
frequency (Think of the color as not changing.)
Newton
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.


20. What is the potential energy of a charge in an electric field?
When it is on the 'dark' side of the mirror. Opposite the light.
Only 1/4 wavelength fits in the tube. L=wavelength/4
wave speed = (wavelength)(frequency)
V=kq/R


21. What stays the same for resistors or capacitors in parallel?
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.
x=(1/2)at^2 Remember - the word 'dropped' implies no initial velocity.
The centripetal force is the net force. It's magnitude is calculated from F=ma where 'a' is the centripetal force.
Change in voltage across the resistor or capacitor.


22. S.I. unit of Flow rate
But placing more obstacles in the path of the charge's flow.
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
m^3/s


23. What is an indication of a change in the internal energy?

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24. Electric force felt by a charge due to another charge.
The bouncing of light
F=kq1q2/R^2
Alpha - Beta - and Gamma
Initial velocity


25. What is the relationship between speed - frequency - and wavelength?
Work is the change in kinetic energy. Work transfers energy to and from a body
Every point on a wave front is a secondary source.
A1v1=a2v2
wave speed = (wavelength)(frequency)


26. In electrostatics - what takes the place of m and g in the formulae?

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27. What forces charges to move?
The velocity is positive
Diverging lenses have a negative focal length.
The electric field forces charges to move.
When it is on the 'dark' side of the mirror. Opposite the light.


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

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29. What is the direction of the centripetal acceleration?
F=qE
Impulse is (force)(time)
The centripetal acceleration points along the radius towards the center of the circle. (Just like the centripetal force.)
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.


30. How does the speed change when the pressure is decreased?
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.
The bouncing of light
Speed ups
It is used in Lenz's Law to determine the change in flux of a conductor.


31. What force is always present - and what is its equation?
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.
Weight ...w=mg
(rho)gh
Something other than zero.


32. 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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33. Condition for no rotation
Sum of the torques equal zero.
Lenses that are fatter in the middle than on the edges.
It is used in Lenz's Law to determine the change in flux of a conductor.
kg•m/s


34. Under what conditions is mechanical work positive?
ZERO. Because the force is perpendicular to the displacement . (Open right hand rule.)
Work is positive when the force and displacement point in the same direction.
2(pi)R/T ...Circumference/Period
The centripetal force points along the radius towards the center of the circle.


35. What does the pattern look like in a Young's Double Slit diffraction pattern?
Dark in the middle and alternating light and dark spots after that.
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.
The body is moving at a constant velocity
The velocity is positive


36. Unit that means the same thing as Nm
Joule
The measure of the average kinetic energy of the molecules.
E=hf
Velocity has a direction and speed does not have direction.


37. Which kind of mirror cannot magnify an image?
Work of a system is equal to 1-Qc/Qh
Convex
Potential energy stored in gravity (PE = mgh)
Magnitude and direction


38. S.I. unit of work
A displacement must occur. ( W=Fd)
Velocity has a direction and speed does not have direction.
Joule
Only 1/4 wavelength fits in the tube. L=wavelength/4


39. What are three ways to increase the capacitance of a capacitor?
Atmospheric pressure
Force lifting a body when it is in a fluid.
velocity
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.


40. What is the name given to the distance between the pivot point and applied perpendicular force?
Moment arm
Potential difference is the change in energy of a charged particle divided by its charge.
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
Diverging lenses have a negative focal length.


41. What are the two forms of the ideal gas law?
They fall - vertically - the by the same amount in the same time.
Change in voltage across the resistor or capacitor.
PV=nRT and PV=kT
frequency (Think of the color as not changing.)


42. What is the electric field's magnitude inside of a container made from an electrical CONDUCTOR?
Zero.
The movement of charges is the current and it is measures by the number of charges per second at a point.
Provided experimental proof of the wave property of light.
(rho)gh


43. What is the horizontal acceleration of projectiles?
ZERO
g=zero so h=(Vyo)t
Atomic mass number minus atomic number.
When the object is beyond the focus for a concave mirror.


44. What is the binding energy?
Watt
Lost kinetic energy is work. It is calculated from Fd or KE:final - KE:initial
Sum of all the energy forms before a condition equals the sum of all the energy forms after the condition.
The energy required to remove an electron or nucleon from a molecule.


45. What does the term potential difference mean?
the refracted ray bends TOWARDS the normal line.
Potential difference is the change in energy of a charged particle divided by its charge.
Diverging lenses have a negative focal length.
Open right hand rule


46. What is the difference between emf and voltage?
Alpha - Beta - and Gamma
According to Coulomb's Law - the new force is 6/4 times the old charge.
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 bouncing of light


47. The 'V' is (rho)Vg
The volume under water
Convex
Impulse
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.


48. If you have two charges - and you double one charge and triple the other - and move them twice as far apart - what happens to the force of attraction / repulsion between them?

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49. What is the relationship between power - voltage and current?
Ohm's Law: V=IR
E=kq/r^2 This is the electric field's magnitude at a point in space.
P=IV
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.


50. When is a normal force present - what is its direction?
Broad bright spot in the middle and alternating dark and light spots to the sides.
When the body rests on a surface.
Bends waves around small objects and the interference of waves from a coherent sources.
PV=nRT and PV=kT