samplex2_1 - University of the Philippines College of Science Physics 72 Set A Second Long Exam First Semester AY 20142015 Name Instructor Section\/Class

samplex2_1 - University of the Philippines College of...

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University of the Philippines College of Science Physics 72 Set A Second Long Exam First Semester, AY 2014–2015 Name: Instructor: Section/Class Schedule: Student Number: Course: College:
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Second Long Exam First Semester, AY 2014–2015 Physics 72 INSTRUCTIONS: Choose the best answer and shade the corresponding circle on your answer sheet. To change your answer, cross-out and sign your original answer and then shade your new answer. No computational devices allowed (e.g. calculators, mobile phones). Any form of cheating in examinations or any act of dishonesty in relation to studies, such as plagiarism, shall be subject to disciplinary action. Following instructions is part of the exam. Useful formulas: Area Volume Sphere (radius= r ) 4 πr 2 4 3 πr 3 Cylinder (radius= r , height= h ) 2 πr 2 + 2 πrh πr 2 h sin( π/ 3) = cos( π/ 6) = 3 / 2 cos( π/ 3) = sin( π/ 6) = 1 / 2 sin( π/ 4) = cos( π/ 4) = 2 / 2 Useful constants: e - 1 . 60 × 10 - 19 C m e 9 . 1 × 10 - 31 kg 0 8 . 854 × 10 - 12 C 2 /Nm 2 k 8 . 988 × 10 9 Nm 2 /C 2 1.We are CLOSED.Which of the following statements is/areTRUEabout the net magneticflux through a closed surface?I. It is dependent on the surface area of the closed surface.II. It is proportional to the enclosed number of magnetic bars.III. It is always equal to zero. A. I onlyB. III onlyC. I and III onlyD. II and III onlySolution:Gauss0s Law for Magnetic Field 2.Bar.A straight wire with massmand lengthLcarries currentIas shown in the figure.Which of the following magnetic fields will result to a zero net force on the wire? ˆ A – 2
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Second Long Exam First Semester, AY 2014–2015 Physics 72 3.CharCharge.What is the charge of the particle?
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