Question 1 (2 points) Atoms are made up positively charged negati...

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Question 1 (2 points) Atoms are made up positively charged negatively charged A , and neutral subatomic particles called The are the subatomic particles that are able to move from atom to atom. Save Question 2 (2 points) An atom that loses electrons becomes charged. An atom that gains electrons becomes charged. All electrostatic result from either an excess or a deficit of electrons. Some materials hold their electrons very tightly and so electrons do not move through them very well. These materials are called Other materials have some loosely held electrons that move through them very easily. These are called Question 3 (2 points) Static electricity is due to the imbalance of positive and negative charges. If two objects have like charges (two positives and two negatives), they will each other. If two objects have opposite charges (a positive and a negative), they will each other. Save Question 4 (2 points) o e-e- e- e- e- e- e- e- e- e-e- e- e- ++ e- e- e- The diagram illustrates a) conduction b) induction c) grounding d) conduction and grounding e) induction and grounding f) conduction, induction and grounding Save Question 5 (2 points) Coulomb's Law states that the force that one charged object exerts on another charged object is inversely proportional to the product of their charges and directly proportional to the square of the distance between them. True False Save Question 6 (2 points) The charge of 3 electrons, in Coulombs, is A X 10^ C. D View hint for Question 6 Save Question 7 (2 points) . Calculate the net charge, Coulombs, of a vanadium atom with 23 protons and 18 electrons. A X 10^ C. Question 8 (2 points) Calculate the electrostatic force between a sodium nucleus, which contains 11 protons, and its innermost electron if the distance between them is 9.5 X 10-13 m? X 10^ A/ N Save Question 9 (2 points) o Identical 15 u C charges are placed at the ends of a metre stick. What is the electrostatic force between them? A/ N Save Question 10 (2 points) o Two small, identical metal spheres contain excess charges of -10.0 C and +6.0 "C, respectively. The spheres are mounted on insulated stands and placed 0.40 m apart. Determine the magnitude and direction of the force between the spheres. N View hint for Question 10 Question 11 (2 points) Identical 12 u C charges are placed at the ends of a metre stick. What is the electric potential at the 60 cm mark on the metre stick? a) 9.0 X 104 V b) 3.8 X 105 V c) 4.5 X 105 V d) 9.8 X 105 V Save Question 12 (2 points) r=3cm r = 5 cm + Q1=-10uC Q2 =+7uC Q3 = -13uC Three charged particles are arranged in a straight line as shown. Determine magnitude and direction of the net electrostatic force acting on particle 2 by the other two charges. N View hint for Question 12 Save Question 13 (2 points) r = 10 cm r=20cm + Q1 =+15uC Q2=-4uC Q3 = -11C Three charged particles are arranged in a straight line as shown. Determine magnitude of the net electrostatic force acting on particle 1 by the other two charges. N View hint for Question 13 Save Question 14 (2 points) Q2 = -7.0C r = 15 cm + Q1 = -12uC 35 cm Q3 = +3.0C Determine the electrostatic force acting on particle 2 by the other two forces. N at degrees Save Question 15 (2 points) What does an electric field line indicate? a) The direction of the electrostatic force on a positive charge. b) The direction of the electrostatic force on a negative charge. c) The magnitude of the electrostatic force on a positive charge. d) The magnitude of the electrostatic force on a negative charge. Save Question 16 (2 points) 1 4 2 fixed Q 3 A positive charge Q is located several metres from a fixed positive charge as shown in the diagram. You are told to move charge Q a distance of 1.0 m so as to cause the greatest increase in its electrical potential energy. In which direction do you move it? a) 1 b) 2 c) 3 d) 4 Save Question 17 (2 points) What is the electric field 0.10 m from a point charge Q1 which carries a charge of 0.20 uC? X 105 N/C away from Q1 Save Question 18 (2 points) What is the initial acceleration of an electron when placed in an electric field at a point where the electric field strength is 6.7 X 105 N/C? X 1017 m/s2 Save Question 19 (2 points) 10.0 m 6.0 m + q,=20uC P q2 The electric field at point P in the diagram is 8500 N/C directed to the right. What is the size and polarity of charge q2? a) + 6.2 C b) 6.2 C c) + 14 MC d) 14 C Save Question 20 (2 points) 50 m 80 m P + + 10uC 10uC What is the magnitude of the electric field at point P in the diagram? a) 22 N/C b) 31 N/C c) 41 N/C d) 50 N/C Save Question 21 (2 points) 4.0 m 3.0 m + + 6.0 uC - 3.0C P What are the magnitude and direction of the electric field at point P? a) 2.4 X 104 N/C left b) 2.4 X 104 N/C right c) 3.0 X 104 N/C left d) 3.0 x 104 N/C right Save Question LL points) Which of the following is not true of electric field lines? a) they start on a negative charge and end on a positive charge b) they never cross c) the are closer together in regions where the field is stronger and further apart where the field is weak d) they begin and end perpendicularly to the charged surface Save Question 23 (2 points) Which of the following is equal to the work required per coulomb to move a positive charge from one position to another in an electric field? a) Ep , the electric potential energy b) change in electric potential energy c) V, electric potential d) AV, electric potential difference POILIST A B A proton is made to travel in a straight line near a fixed positively charged object as shown in the diagram. What is happening to the proton's electric potential energy as it travels from A to B? a) it is increasing b) it is decreasing c) it is increasing then decreasing d) it is decreasing then increasing Save Question 25 (2 points) o What particles make up the beam in a cathode ray tube? a) atoms b) protons c) neutrons d) electrons Question 26 (2 points) What is the electric potential 8.5 X 10-1 11 m from a proton? A V Save

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