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PHY 2054 – College Physics II pleaseMonday, December 5, 2022, 10:00 AM – 12:50 PM
Monday, December 5, 2022, 10:00 AM – 12:50 PM
Practice Midterm Exam 1 As soon as you begin your proctored session, hold up your government issued ID so that both the card and your face are clearly visible on screen. Hold the card for a minimum of five full seconds before beginning the quiz. If you have any issues with your webcam during the assessment, continue working, then contact Webcourses@UCF Support (http://online.ucf.edu/support/) . After completing the assessment, you may turn off your webcam. For questions or assistance, please contact Webcourses@UCF Support (407) 823-0407 or
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[email protected]) 15 ptsQuestion 1 What is the force on the q =-1nC point charge, if q =-2nC, and distance d is 0.1m. Provide your answer in 10 N (for instance if the right answer is 0.00025N or 2.5x10 N, you will need to introduce "2.5" in the answer box). k=9.0x10 Nm /C 1 2 -4 -4 9 2 2 4 ptsQuestion 2 Stop Webcam Show Webcam http://online.ucf.edu/support/ mailto:
[email protected] https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# The strogest electric field is at the mid point between the particles The charge on P is smaller than the charge on Q The electrostatic force on P is smaller than the force on Q Both particles are negatively charged The figure shows electric field lines arising from two small charged particles P and Q. 15 ptsQuestion 3 https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# What is the electric potential at the dot due to charges q1=-1nC, q2=9nC, and q3=4nC, The distance a is 0.03m, while the distance b is 0.09m. Please provide your answer in units of V. 4 ptsQuestion 4 A region of space contains a uniform electric field, directed toward the right, as shown in the figure. Which statement about this situation is correct? https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# The potentials at points A and B are equal, and the potential at point C is higher than the potential at point A. The potential at points A and B are equal, and the potential at point C is lower than the potential at point A. The potential at all three locations is the same The potential at point A is the highest, the potential at point B is the second highest, and the potential at point C is the lowest 4 ptsQuestion 5 trThe elecic field is zero at the surface The electric field is constant at the surface The electric potential is constant over the surface The electric potential of the surface is zero Which statements must be true about the surface of a charged conductor in which no charge is moving? 4 ptsQuestion 6 https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# A C B D Three equal charges +Q are at three of the corners of a square of side d. A fourth charge +Q of equal magnitude is at the center of the square as shown in the figure Which one of the arrows shown represents the net force acting on the charge at the center of the square? 15 ptsQuestion 7 https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# Two particles with charge +q and -q of 71nc are positioned as shown in the figure. The distance d is 0.31m. What is the strength of the electric field at the point indicated by the dot (in units of N/C)? k=9.0x10 Nm /C9 2 2 4 ptsQuestion 8 spheres #1 and #2 are still uncharged spheres #1 and #2 both carry negative charge. sphere #1 carries positive charge and #2 carries negative charge. sphere #1 carries negative charge and #2 carries positive charge. Two uncharged metal spheres, #1 and #2, are mounted on insulating support rods. A third metal sphere, carrying a positive charge, is then placed near #2. Now a copper wire is momentarily connected between #1 and #2 and then removed. Finally, sphere #3 is removed. In this final state https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# 4 ptsQuestion 9 The dipole rotates counterclockwise The dipole remains motionless The dipole rotates clockwise The dipole moves to the left The dipole moves to the right. A dipole is held motionless in a uniform electric field. When the dipole is released, which of the following describes the subsequent motion? 4 ptsQuestion 10 impossible to determine based on the information given negative zero If the electric potential at a point in space is zero, then the electric field at that point must be https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# positive uniform 4 ptsQuestion 11 3 1/2 1 1/3 2 The Figure shows two points inside a capacitor. The potential at the negative plate is 0V. What is the ration V /V of the electric potentials at these two points inside the capacitor? 1 2 4 ptsQuestion 12 https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# A and B have the same acceleration B A The acceleration for A and B are zero Two protons, A and B, are in an electric field. Which proton has the smallest acceleration? 4 ptsQuestion 13 https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# 4q q and 2q are tied q and 4q are tied q 2q Which of the three right-hand charges experiences the largest force? 4 ptsQuestion 14 It increases by a factor of 16 It increases by a factor of 8 It increases by a factor of 2 It increases by a factor of 4 Two point charges, Q and Q , are separated by a distance R. If the magnitudes of both charges are halved and their separation is also halved, what happens to the electrical force that each charge exerts on the other one? 1 2 https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# No new data to save. Last checked at 10:36pm It remains the same 15 ptsQuestion 15 What is the magnitude of the vertical electric field that will balance the weight of a plastic sphere of mass 2.0g that has been charged to -3.0 nC? Provide your answer in 10 N/C. (for instance if the right answer is 1.1X10 N/C, you will need to introduce "1.1" in the answer box). k=9.0x10 Nm /C 6 6 9 2 2 Submit Quiz https://webcourses.ucf.edu/courses/1414264/quizzes/2328483/take# Midterm exam 2 Find the intensity of the current in Amperes through the resistor R . R =4ohm, R =1ohm, R =3ohm, and emf=4V. B a b c 10 ptsQuestion 2 Find the current in Amperes through the resistor R=2 ohm if emf =8V and emf =7V. 1 2 https://webcourses.ucf.edu/courses/1414264/quizzes/2314230/take# 4 ptsQuestion 3 increases decreases ncreases for a time and then starts to decrease does not change As more resistors are added in parallel to a constant voltage source, the power supplied by the source 4 ptsQuestion 4 https://webcourses.ucf.edu/courses/1414264/quizzes/2314230/take# https://webcourses.ucf.edu/courses/1414264/quizzes/2314230/take# A, C, B A, B, C C, B, A B, A, C Identical light bulbs can be attached to identical ideal batteries in three different ways (A, B, or C), as shown in the figure. The ranking (from highest to lowest) of the total power produced by the battery is 4 ptsQuestion 5 The equivalent resistance is less than that of the largest resistor. The equivalent resistance is more than the largest resistance. Four unequal resistors are connected in series with each other. Which one of the following statements is correct about this combination? https://webcourses.ucf.edu/courses/1414264/quizzes/2314230/take# The equivalent resistance is equal to that of any one of the resistors. The equivalent resistance is equal to average of the four resistances. 4 ptsQuestion 6 B D A C Chose the circuit in which is described by the following: Two batteries, a resistor between them, and a capacitor in parallel with the resistor. The batteries are connected negative pole to positive pole. 4 ptsQuestion 7 https://webcourses.ucf.edu/courses/1414264/quizzes/2314230/take# https://webcourses.ucf.edu/courses/1414264/quizzes/2314230/take# the power generated in each resistor is the same the potential drop is always the same across each resistor the same current always runs through each resistor the largest resistance has the largest current through it When unequal resistors are connected in parallel in a circuit: 20 ptsQuestion 8 Find the the potential drop across R . R =10ohm, R =4ohm, R =3ohm, R =9ohm, and emf=9V. 4 1 2 3 4 15 ptsQuestion 9 https://webcourses.ucf.edu/courses/1414264/quizzes/2314230/take# https://webcourses.ucf.edu/courses/1414264/quizzes/2314230/take# How much charge is transferred from the battery to the capacitors as the capacitors charge? C =1x10 F, C =7x10 F, C =8x10 F, and emf=2. Provide your answer in micro C (for instance if the right answer is "5.5micro C" or "5.5x10 C", you will need to introduce "5.5" in the answer box). 1 -6 2 -6 3 -6 -6 4 ptsQuestion 10 The 1Ω resistor The 9Ω resistor They dissipate the same power Which resistor dissipates less power? https://webcourses.ucf.edu/courses/1414264/quizzes/2314230/take# 4 ptsQuestion 11 increases does not change decreases As more resistors are added in series to a constant voltage source, the power supplied by the source 4 ptsQuestion 12 What does the voltmeter read? https://webcourses.ucf.edu/courses/1414264/quizzes/2314230/take# https://webcourses.ucf.edu/courses/1414264/quizzes/2314230/take# Quiz saved at 10:40pm Nothing because this will fry the meter. 3 ohm 6V 3V 2V 4 ptsQuestion 13 twice as large as before the same as before one-half as large as before three times as large as before A capacitor C is connected in series with a resistor R across a battery and an open switch. If a second capacitor of capacitance 2C is connected in parallel with the first one, the time constant of the new RC circuit will be Submit Quiz https://webcourses.ucf.edu/courses/1414264/quizzes/2314230/take# Quiz: Practice Exam - Midterm Exam 3 11/13/22, 2:56 PMQuiz: Practice Exam - Midterm Exam 3 Page 1 of 16https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take Practice Exam - Midterm Exam 3 Started: Nov 13 at 2:53pm Quiz Instructions For the exam you must: 4 ptsQuestion 1 Path c Path a non of the paths provided A negatively charged particle is moving to the right, as shown in the figure. Suddenly it encounters uniform magnetic field pointing out of the page. Which one of the three paths shown will it follow in the field? e https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take# 11/13/22, 2:56 PMQuiz: Practice Exam - Midterm Exam 3 Page 2 of 16https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take Path b 4 ptsQuestion 2 There is no current, because no power supply is connected right to left left to right out of the page into the page A 1 kg horizontal aluminum bar, 0.1 m long, is pushed by a force F between two vertical metal rods that are 0.1 m apart. A 0.1T magnetic field is directed perpendicular to the plane of the rods as indicated. A 5 Ω resistor is connected across the two rods at the bottom. What is the direction of the current through the aluminum bar? https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take# 11/13/22, 2:56 PMQuiz: Practice Exam - Midterm Exam 3 Page 3 of 16https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take 10 ptsQuestion 3 An aluminum bar moves with a speed 6m/s between two copper roads in a magnetic field of 5T as indicated on the figure. The distance between the cooper roads is 7m. The aluminum bar is always in contact with cooper roads and moves without friction. A voltmeter is coupled between the roads. What is the potential measured by the voltmeter (in volt), if the resistance of the rods and aluminum bar are consider to be negligible? 10 ptsQuestion 4 https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take# https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take# 11/13/22, 2:56 PMQuiz: Practice Exam - Midterm Exam 3 Page 4 of 16https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take An aluminum bar moves with a speed 2.46m/s between two copper roads in a magnetic field of 0.2T as indicated on the figure. The distance between the cooper roads is 0.5m. The aluminum bar is always in contact with cooper roads and moves without friction. A resistor with a resistance of 4ohm is coupled between the roads. Consider that the resistance of the copper rods and aluminum bar are zero ohms? What is the power dissipated by the resistor in Watt? (if the right answer is 4.4x10 W, you will need to input 0.0044) -3 15 ptsQuestion 5 https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take# 11/13/22, 2:56 PMQuiz: Practice Exam - Midterm Exam 3 Page 5 of 16https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take Two vertical copper wires carry a current I =4A while two horizontal cooper wires carry a current I =74A as indicated on the drawing. Calculate the magnitude of the magnetic field in Tesla at the blue dot, which is positioned at distance d1=2.90m from the vertical wires and distance d2=6.0m from the vertical wires. Provide your answer in 10 T (for instance if your answer is 2.45*10 T, you will need to input 2.45 in the answer box) 1 2 -6 -6 15 ptsQuestion 6 https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take# 11/13/22, 2:56 PMQuiz: Practice Exam - Midterm Exam 3 Page 6 of 16https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take Calculate the total magnetic force on Wire 2, if I=39A, d=7.2m and the length of all wires is 1m. Please provide your answer in Newtons (if the right answer is "1.5x10 N" you need to input "1500" or if the right answer is "2.5x10 N" you need to input "0.025") 3 -2 4 ptsQuestion 7 https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take# 11/13/22, 2:56 PMQuiz: Practice Exam - Midterm Exam 3 Page 7 of 16https://webcourses.ucf.edu/courses/1414264/quizzes/2314233/take The distance between