UMass Amherst PHYSICS 132  Exam3Conceptualquestionsforstudents (11 pages)
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Exam3Conceptualquestionsforstudents
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 11
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 University of Massachusetts Amherst
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 Physics 132  Intro Physics II
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Exam 3 conceptual problems Name 1 In the figure a bar magnet moves away from the solenoid The induced current through the resistor R is A from b to a B from a to b C zero 1 2 Draw a circuit consisting of a battery connected to two resistors R1 and R2 in series with each 2 other and a capacitor C connected across the resistors A R1 R2 C B R1 C C R2 R2 R2 C D R1 R2 C 1 3 An ampere is a unit of electrical A current B resistance C pressure D all of these E none of these 3 4 When there is a change in the magnetic field in a closed loop of wire A a current is created in the loop of wire B electromagnetic induction occurs C a voltage is induced in the wire D all of these E none of these 4 5 Draw a circuit with a battery connected to four resistors R1 R2 R3 and R4 Resistors R1 and R2 are connected in parallel resistors R3 and R4 are connected in parallel and both parallel pairs 5 of resistors are connected in series A R1 R2 R3 R4 B R3 R4 R1 R2 C R1 R2 R3 R4 2 D R1 R3 R2 R4 6 Metal detectors like the ones used at airports are activated by A magnetic fields B electric fields C alternating current D electromagnetic induction 6 7 Outside a magnet magnetic field lines are conventionally drawn from A north to south B south to north C either way 7 8 While a magnet is moved toward the end of a solenoid a voltage difference is induced between the two ends of the solenoid wire The voltage difference would be larger if 8 A the bar magnet produced a stronger magnetic field B the solenoid contained more loops while having the same length C the speed of the magnet were increased D All of the above statements are true E Only two of the above statements are true 9 When a bar magnet is thrust into a coil of copper wire the coil tends to A repel the magnet as it enters B attract the magnet as it enters C both of these D neither of these 3 9 10 In the figure two parallel wires carry a current I in opposite directions A rectangular loop is midway between the wires The current I is decreasing
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