Answered: There are two charged balls A, B placed…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter15: Electric Forces And Fields

Section15.3: Electric Fields

Problem 15.3QQ: A test charge of + 3 C is at a point P where the electric field due to other charges is directed to...

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1. There are two charged balls A, B placed in contact with a total charge of +12Q. An additional charged ball C was in contact with A & B. When electrostatic equilibrium occured among the three balls, B is then separated from both A & C resulting to the final charge of Y = - 6Q. Assuming A, B, & C are identical in size, what is the original charge of C? A. - 6Q B. 6Q C. - 30Q D. - 18Q 2. An isolated parallel-plate capacitor has an inital capacitance of 400nF and a charge of 5uC. Find the potential energy if the stored charge is doubled. A. - 125uJ B. 125uJ C. 93.8uJ D. 31.3uJ 3. With the following statements regarding resistivity and conductivity of a thing, which is/are ALWAYS TRUE? I. Resistivity of a thing is temperature-dependent. II. Conductivity of a thing is temperature-dependent. III. When resistivity of a material increases, then there is a decrease in conductivity. 4. The proton is in acceleration and directed eastward at 4x10^8m/s^2 after being released from rest. What is the direction and magnitude of the electric field? A. To the right, 2.28 N/C B. To the left, 2.28N/C C. To the right, 4.18N/C D. To the left, 4.18 N/C 5. A 5m in length and 3m in width rectangular paper is immersed in a uniform electric field with magnitude 14.0N/C. If the paper is put at an angle of 30 degrees from the xy-plane and the electric field is pointing in the z-direction. Find the magnitude of the electric flux through the paper. A. 51.96 Nm^2/C B. 210.0 Nm^2/C C. 181.9 Nm^2/C D. 105.0 Nm^2/C Please answer all for a 100% rating. Thank you so much!

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