Exam 2 -- Fall 2003 - Physics 240 Fall 2003: Exam #2 Please...

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Physics 240 Fall 2003: Exam #2 Please print your name:___________________________________________________ Please list your discussion section number:___________________________________ Please list your discussion instructor:________________________________________ Form #1 Instructions 1. Fill in your name above 2. This will be a 1.5 hour, closed book exam. The exam includes 20 questions. 3. You may use a calculator, please do not share calculators 4. You may use two 3”x5” note cards (one from the first exam, plus one new one) with notes and equations you think may be useful. You can write on both sides of the card if you like. 5. You will be asked to show your University student ID card when you turn in your exam. ID checked by:___________________________________ Table of constants: ε 0 = 8.85 x 10 -12 C 2 /Nm 2 k = 1/(4 πε 0 ) q electron =-1.6 x 10 -19 C q proton =1.6 x 10 -19 C m electron =9.1 x 10 -31 kg m proton =1.67 x 10 -27 kg µ 0 = 4 π x 10 -7 Tm/A G = 6.67 x 10 -11 Nm 2 /kg 2
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1: Which of the following is equivalent to the quantity 1000 Ohms * 20 microFarads? A) 20000 Joules/second B) 0.02 kilogram*meters/second C) 0.0002 volts D) 0.02 seconds E) 20000 Newtons/Coulomb 2: What is the equivalent resistance of the resistor network seen by the battery shown in the figure? A) 5R/2 B) 5R/3 C) 2R D) 11R/5 E) R/2 V R 2R R 2R
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3: Three identical light bulbs are connected in a circuit as shown. Each of the bulbs has a resistance of 30 , and the battery supplies a voltage of 30V. How much power does light B consume? A) 30W B) 60W C) 10W D) 20W E) 50W 4: A mass spectrometer accelerates a singly charged ion to a velocity of 4.5x10 5 m/s before injecting it into region with a constant 0.400 Tesla field. A ‘singly charged ion’ has a charge equal in magnitude to the electron charge. If it bends to the left in a circular path with a radius of 25 cm, what is the mass of the ion? A) 2.6x10 -27 kg B) 9.1x10 -31 kg C) 3.6x10 -26 kg D) 8.3x10 -25 kg E) 3.3x10 -24 kg A B C
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5: Five ions, labeled A-E, all enter a region of uniform magnetic field with the same velocity. Which ion lands at position 3? 6: In Oersted’s laboratory a compass needle is aligned with a constant magnetic field.
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Exam 2 -- Fall 2003 - Physics 240 Fall 2003: Exam #2 Please...

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