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A charge experiences a 0.47- force in the positive direction. Part A If this charge is replaced with a charge, find the magnitude of the force in this case. Express your answer using two significant figures. ANSWER: = 0.25 Correct Part B Find the direction of the force in this case. ANSWER: in the positive direction in the negative direction perpendicular to the direction Correct Problem 1.12
An object with a charge of -3.0 and a mass of 1.4 × 10 2 experiences an upward electric force, due to a uniform electric field, equal in magnitude to its weight. Part A Find the magnitude of the electric field. Express your answer using two significant figures. ANSWER: = 4.6 × 10 4 Correct Part B Find the direction of the electric field. ANSWER: upward downward to the left to the right Correct Part C If the electric charge on the object is doubled while its mass remains the same, find the direction and magnitude of its acceleration. Express your answer using three significant figures. ANSWER: = 9.81 Correct Part D If the electric charge on the object is doubled while its mass remains the same, find the direction and magnitude of its acceleration. ANSWER: upward downward to the left to the right Correct

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Problem 1.13 IP A point charge = 4.5 is placed at each corner of an equilateral triangle with sides 0.27 in length. Part A What is the magnitude of the electric field at the midpoint of any of the three sides of the triangle? Express your answer using two significant figures. ANSWER: = 7.4 × 10 5 All attempts used; correct answer displayed Part B Is the magnitude of the electric field at the center of the triangle greater than, less than, or the same as the magnitude at the midpoint of a side? Explain. ANSWER: My Answer: Problem 1.14
The electric field at the point and points in the positive direction with a magnitude of 10.0 . At the point and the electric field points in the positive direction with a magnitude of 13.0 . Assume this electric field is produced by a single point charge. Part A Find the charge's location. ANSWER: = 45.7 Correct Part B Find the sign of the charge. ANSWER: positive negative Correct Part C Find the magnitude of the charge. ANSWER: = 184 All attempts used; correct answer displayed Score Summary: Your score on this assignment is 91.4%. You received 12.79 out of a possible total of 14 points.
• Spring '12
• Griffith
• Physics, Charge, Electric charge, 91.4%, 1.5 Coulomb, magnitute

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