UH PHYS 1302 - Exam 1 Spring 2014_DasPhysics1302 (5 pages)

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Exam 1 Spring 2014_DasPhysics1302



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Exam 1 Spring 2014_DasPhysics1302

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old practice exam 1


Pages:
5
School:
University of Houston
Course:
Phys 1302 - Introductory to Physics II

Unformatted text preview:

Physics 1302 Exam 1 Professor Mini Das Type Group 1 1 Three point charges are placed on the x axis A charge of 2 0 C is placed at the origin 2 0 C to the right at x 50 cm and 4 0 C at the 100 cm mark What are the magnitude and direction of the electrostatic force which acts on the charge at the origin A 0 072 N towards right B 0 072 N towards left C 0 143N toward left D 0 143N towards right 2 An atomic nucleus has a charge of 40e An electron is 10 9 m from the nucleus What is the force on the electron A 3 7 nN B 9 2 nN C 1000 C D 6 8 nN E 2 9 nN 3 A charged rod carrying a negative charge is brought near two spheres that are in contact with each other but insulated from the ground If the two spheres are then separated what kind of charge will be on the spheres A The spheres do not get any charge B The sphere near the charged rod becomes negative and the other becomes positive C The sphere near the charged rod becomes positive and the other becomes negative D None of the other choices is correct 4 Two point charges of 20 0 C and 8 00 C are separated by a distance of 20 0 cm What is the intensity of electric field E midway between these two charges A 25 2 105 N C directed towards the positive charge B 25 2 104 N C directed towards the negative charge C 25 2 105 N C directed towards the negative charge D 25 2 106 N C directed towards the negative charge E 25 2 106 N C directed towards the positive charge 5 5 A styrofoam ball of mass 0 120 g is placed in an electric field of 6000 N C pointing downward What charge must be placed on the ball for it to be suspended A 18 0 nC B 57 2 nC C 16 0 nC D 125 nC E 196 nC 6 Consider the x axis with 4 0 C at x 1 0 meter and 2 0 C at the origin Where should 6 0 C be placed so that the net force on it is zero A 2 4 m B 2 4 m C 5 m D 5m 7 A 5 0 C charge is moved from a negative to a positive plate of a parallel plate capacitor In moving this charge 0 30 mJ of energy is used What is the potential difference between the plates of this



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