NY Regents
June 2008, Part 2
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21. An electric circuit contains a variable resistor connected to a source of constant voltage. As the resistance of the variable resistor is increased, the power dissipated in the circuit
(1) decreases
(2) increases
(3) remains the same
22. An electron is located in the electric field between two parallel metal plates as shown in the diagram below.
If the electron is attracted to plate A, then plate A is charged
(1) positively, and the electric field is directed from plate A toward plate B
(2) positively, and the electric field is directed from plate B toward plate A
(3) negatively, and the electric field is directed from plate A toward plate B
(4) negatively, and the electric field is directed from plate B toward plate A
23. A potential difference of 10.0 volts exists between two points, A and B, within an electric field. What is the magnitude of charge that requires 2.0 × 10
–2
joule of work to move it from A to B?
(1) 5.0 × 10
2
C
(2) 2.0 × 10
–1
C
(3) 5.0 × 10
–2
C
(4) 2.0 × 10
–3
C
24. A circuit consists of a resistor and a battery. Increasing the voltage of the battery while keeping the temperature of the circuit constant would result in an increase in
(1) current, only
(2) resistance, only
(3) both current and resistance
(4) neither current nor resistance
25. The time required for a wave to complete one full cycle is called the wave’s
(1) frequency
(2) period
(3) velocity
(4) wavelength
26. An electromagnetic
AM-band radio wave
could have a wavelength of
(1) 0.005 m
(2) 5 m
(3) 500 m
(4) 5,000,000 m
27. The diagram below represents a transverse wave.
The wavelength of the wave is equal to the distance between points
(1) A and G
(2) B and F
(3) C and E
(4) D and F
28. When a light wave enters a new medium and is refracted, there must be a change in the light wave’s
(1) color
(2) frequency
(3) period
(4) speed
29. The speed of light in a piece of plastic is 2.00 × 10
8
meters per second. What is the absolute index of refraction of this plastic?
(1) 1.00
(2) 0.670
(3) 1.33
(4) 1.50
30. Wave X travels eastward with frequency
f
and amplitude
A
. Wave Y, traveling in the same medium, interacts with wave X and produces a standing wave. Which statement about wave Y is correct?
(1) Wave Y must have a frequency of f, an amplitude of A, and be traveling eastward.
(2) Wave Y must have a frequency of 2f, an amplitude of 3A, and be traveling eastward.
(3) Wave Y must have a frequency of 3f, an amplitude of 2A, and be traveling westward.
(4) Wave Y must have a frequency of f, an amplitude of A, and be traveling westward.
31. The diagram below represents two pulses approaching each other from opposite directions in the same medium.
Which diagram best represents the medium after the pulses have passed through each other?
32. A car’s horn is producing a sound wave having a constant frequency of 350 hertz. If the car moves toward a stationary observer at constant speed, the frequency of the car’s horn detected by this observer may be
(1) 320 Hz
(2) 330 Hz
(3) 350 Hz
(4) 380 Hz
33. A
mercury atom in the ground state
absorbs 20.00 eV (electronvolts) of energy and is ionized by losing an electron. How much kinetic energy does this electron have after the ionization?
(1) 6.40 eV
(2) 9.62 eV
(3) 10.38 eV
(4) 13.60 eV
34. Which fundamental force is primarily responsible for the attraction between protons and electrons?
(1) strong
(2) weak
(3) gravitational
(4) electromagnetic
35. The total conversion of 1.00 kilogram of the Sun’s mass into energy yields
(1) 9.31 × 10
2
MeV
(2) 8.38 × 10
19
MeV
(3) 3.00 × 10
8
J
(4) 9.00 × 10
16
J
Part B:
Answer all questions in this part. For each statement or question, write on the separate answer sheet the number of the word or expression that, of those given, best completes the statement or answers the question.
36. The mass of a paper clip is approximately
(1) 1 × 10
6
kg
(2) 1 × 10
3
kg
(3) 1 × 10
–3
kg
(4) 1 × 10
–6
kg
37. The graph below represents the displacement of an object moving in a straight line as a function of time.
What was the total distance traveled by the object during the 10.0-second time interval?
(1) 0 m
(2) 8 m
(3) 16 m
(4) 24 m
38. Which diagram best represents the gravitational forces, F
g
, between a satellite, S, and Earth?
39. A block weighing 10.0 newtons is on a ramp inclined at 30.0° to the horizontal. A 3.0-newton force of friction, F
f
, acts on the block as it is pulled up the ramp at constant velocity with force F, which is parallel to the ramp, as shown in the diagram below.
What is the magnitude of force F?
(1) 7.0 N
(2) 8.0 N
(3) 10. N
(4) 13 N
40. A 25-newton horizontal force northward and a 35-newton horizontal force southward act concurrently on a 15-kilogram object on a frictionless surface. What is the magnitude of the object’s acceleration?
(1) 0.67 m/s
2
(2) 1.7 m/s
2
(3) 2.3 m/s
2
(4) 4.0 m/s
2
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