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in Series Equivalent Capacitanc e of Two Capacitors in Parallel Practice Questions The following choices refer to a circuit consisting of a resistor and a battery. (A) It is doubled (B) It is quadrupled (C) It is halved (D) It is quartered (E) It remains the same 1. . What happens to the current in the resistor when the voltage is doubled and the resistance remains the same? 2. . What happens to the power dissipated in the resistor when the resistance is quadrupled and the voltage remains constant? 3. . Which of the following affects the resistance of a wire? I. The material from which it is made II. The length of the wire III. The diameter of the wire (A) I only (B) II only (C) I and II only (D) I and III only (E) I, II, and III 240
4. . Two resistors, and , are identical, but the potential difference across is half the potential difference across . What is the ratio of the current in to the current in ? (A) (B) (C) 1 (D) 2 (E) 4 Questions 5 and 6 refer to two identical resistors, arranged in parallel. 5. . If a third identical resistor is added in parallel, what is the ratio of the new equivalent resistance to the old? (A) (B) (C) 1 (D) (E) 6. . Assuming the voltage is kept constant, what is the ratio between the new current and the old current when a third identical resistor is added in parallel with the earlier two? (A) (B) (C) 1 (D) (E) 241
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SATII PHYSICS (FROM SPARKNOTES.COM)
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The Good • Because SAT II Subject
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Which SAT II Subject Tests to Take
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After grumbling, however, you still
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Waves 15-19% 11-15 Waves 10% 7-8 Op
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negative, so E, and not A, is the c
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including them anyway because it’
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Two positively charged particles, o
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will a visual representation reliev
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Physics Hint 6: Be Flexible Knowing
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There are a number of ways to label
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Adding Parallel Vectors If the vect
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The result of multiplying A by c is
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neither parallel nor perpendicular.
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Suppose the hands on a clock are ve
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Vector Addition Practice Questions
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2. A The vector 2A has a magnitude
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path, Alan has traveled a much grea
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school student called Andrea. Andre
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centimeters to the left of its star
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We can learn two things about the a
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Acceleration vs. Time Graphs After
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The variable represents the object
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Note that there are certain conveni
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1. . An athlete runs four laps of a
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10. . A woman runs 40 m to the nort
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We know the total distance the spri
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Principles of Natural Philosophy. I
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The component form of Newton’s Se
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e in the direction. And since the s
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which reflects its resistance to be
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In the diagram above, the weight an
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A student pushes a box that weighs
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1. . Each of the figures below show
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7. . In the figure above, a person
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Since the block is motionless, the
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When we are told that a person push
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EXAMPLE A water balloon of mass m i
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The graph above plots the force exe
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Though energy is always measured in
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there is a negative amount of work
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smallest. The answer to question 3
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Mechanical Energy Average Power Ins
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to a height of 8 m over a time of 4
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8. C When the book reaches the pers
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determining what those right number
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the ground. The system is initially
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calculators, you almost certainly w
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and minimize M.” With such a ques
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2. WHAT IS THE ACCELERATION OF THE
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Adding these two equations together
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force of friction: . Using Newton
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m, placed on a frictionless surface
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Frequency is given in units of cycl
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of the spring due to the gravitatio
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The oscillation of a pendulum is mu
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Velocity Calculating the velocity o
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Practice Questions 1. . Two masses,
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7. . An object of mass 3 kg is atta
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Since the system is in equilibrium,
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velocity, v. Linear momentum is den
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Conservation of Momentum If we comb
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As we might expect, the final veloc
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A pool player hits the eight ball,
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two-dimensional collision is effect
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For a System of Two Particles For a
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At the front end of the boat, the f
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4. . A scattering experiment is don
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1. B The athlete imparts a certain
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7. E Momentum is conserved in this
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The diver’s translational motion
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30 π/6 45 π/4 60 π/3 90 π/2 180
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elative position to one another. As
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acceleration given its angular velo
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To find the direction of a rigid bo
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A student exerts a force of 50 N on
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The torque that produces the angula
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The masses in the figure above are
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an object sliding down a frictionle
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Velocity Average Angular Accelerati
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3. . What is the direction of the a
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1. D An object that experiences 120
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At the top of the incline, the disk
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from a Latin word meaning “center
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Newton’s Law of Universal Gravita
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when you are beneath the surface of
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EXAMPLE A satellite of mass is laun
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Kepler’s Laws After poring over t
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Practice Questions Questions 1-3 re
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8. . A satellite orbits the Earth a
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Circumference and radius are relate
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learn how heat is transferred from
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heat, like rubber, have a high spec
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Just as specific heat tells us how
Page 189 and 190: Conduction is the transfer of heat
Page 191 and 192: Effectively, this equation tells us
Page 193 and 194: the way that it does. The Laws of T
Page 195 and 196: There are a number of equivalent fo
Page 197 and 198: If we know our formulas, this probl
Page 199 and 200: 5. . An ideal gas is enclosed in a
Page 201 and 202: Asphalt, like most materials, has a
Page 203 and 204: The things we call atoms today are
Page 205 and 206: If they come up on SAT II Physics,
Page 207 and 208: will move in the opposite direction
Page 209 and 210: Work The work done to move a charge
Page 211 and 212: Much like gravitational potential e
Page 213 and 214: 3. . A particle of charge +2q exert
Page 215 and 216: 7. . A particle of charge +q is a d
Page 217 and 218: The vector sum of the three vectors
Page 219 and 220: Voltage The batteries we use in fla
Page 221 and 222: This equation tells us that we can
Page 223 and 224: If the two variables you know are a
Page 225 and 226: However, each resistor causes a vol
Page 227 and 228: So = 4 . WHAT IS THE CURRENT RUNNIN
Page 229 and 230: Consider again the circuit whose to
Page 231 and 232: This circuit consists of resistors
Page 233 and 234: The junction rule deals with “jun
Page 235 and 236: across the loop. We can express the
Page 237 and 238: capacitance is halved. The proporti
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Page 243 and 244: 10. . A dielectric is inserted into
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Page 247 and 248: The Earth itself acts like a huge b
Page 249 and 250: Because the velocity vector and the
Page 251 and 252: A particle with a positive charge o
Page 253 and 254: The constant is called the permeabi
Page 255 and 256: 1. . The pointer on a compass is th
Page 257 and 258: 7. . A positively charged particle
Page 259 and 260: 1. B To solve this problem, it is h
Page 261 and 262: If the particle is to move at a con
Page 263 and 264: flowing in the counterclockwise dir
Page 265 and 266: Next, let’s calculate the flux th
Page 267 and 268: Remember that field lines come out
Page 269 and 270: Magnetic Flux Faraday’s Law / Len
Page 271 and 272: 5. . A wire carrying 5.0 V is appli
Page 273 and 274: In this equation, A is the amplitud
Page 275 and 276: Ernst attaches a stretched string t
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Page 279 and 280: other. The principle of superpositi
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Page 283 and 284: The Doppler Effect So far we have o
Page 285 and 286: Practice Questions 1. . Which of th
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where and are the frequency heard b
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A higher frequency—and thus a sho
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The phenomenon of refraction result
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Since we know that the ratio of / i
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The four basic kinds of optical ins
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You can test all this yourself with
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Because is a positive number, we kn
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As the diagram shows us, and as the
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At any point P on the back screen,
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Note that the pattern is brightest
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One of the more common ways of test
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3. . When the orange light passes f
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9. . Sound waves do not exhibit pol
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7. E Only concave mirrors and conve
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For people who believed that light
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What does this all mean? Time is re
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A spaceship flying toward the Earth
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Rutherford’s Gold Foil Experiment
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The Wave Theory of Electromagnetic
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The Problem with Rutherford’s Mod
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Don’t worry: you don’t need to
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A hydrogen atom is energized so tha
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where is the uncertainty in a parti
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electrons have mass, it is so negli
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chapters on mechanics are the resul
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You won’t need to calculate the n
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Photoelectro n Radius of Electron O
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5. . An electron is accelerated thr
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according to the formula , where l
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In radioactive substances, the numb
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A scale for measuring temperature,
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The points of maximum displacement
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Electromagnetic spectrum The spectr
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The amount of time it takes for one
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Given the period, T, and semimajor
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The substance that is displaced as
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A back-and-forth movement about an
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Refracted ray Refraction Restoring
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T Tail Tangent A body or set of bod
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Weber Weight The force involved in
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pinpointing what you need to study
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If you got a question wrong because
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