Numerade

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Zack A

Numerade educator

Question 13 A +4.0 C-point charge and a -4.0-C point charge are placed as shown in the figure. What is the potential difference, VA - VB, between points A and B? (k = 1/4??0 = 8.99 × 10^9 N ? m^2/C^2) 12 kV 48 V 96 kV 35 V

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Jerelyn Nevil

Numerade educator

When the electric field is zero at a point, the potential must also be zero there. False True

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Vishal Gupta

Numerade educator

Question 11 1 pts A +3.0nC charge q is initially at rest a distance 15 cm (r1) from a +5.0nC charge Q fixed at origin. How much work is needed to move the +3.0nC charge from 15cm to 10cm (r2) away from the +5.0nC charge? -4.5 x 10^-7 J +5.0 x 10^-17 J -5.0 x 10^-17 J +4.5 x 10^-7 J

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Breanna Ollech

Numerade educator

An electron is accelerated from rest through a potential difference 12 V. How much kinetic energy does the electron gain? -1.2 x 10^-19 J -1.33 x 10^-20J 7.5 x 10^19 J 19.2 x 10^-19 J

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Breanna Ollech

Numerade educator

An electron is accelerated from rest through a potential difference 12 V. What is the change in electric potential energy of the electron? 7.5 x 10^19 J -1.33 x 10^-20J +19.2 x 10^-19 J -19.2 x 10^-19 J

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Breanna Ollech

Numerade educator

How much work is required to bring together the three given charges from infinity to the corners of an equilateral triangle of side length 1cm? q1 = 1?C, q2 = 2?C, q3 = 3?C 5.4 J 99 mJ 9.9 J 720 J

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Breanna Ollech

Numerade educator

Question 7 If a charge of magnitude +4e is being held in place 3 nm from a charge of -5e which is also being held in place. What is the potential energy of the system? -1.5 x 10^-18 J -1.5 x 10^-18 J -2.5 x 10^-18 J -1.7 x 10^-18 J

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Breanna Ollech

Numerade educator

Question 6 What is the direction of the electric potential gradient at a certain point? perpendicular to the direction of the electric field at that point the same as the direction of the electric field at that point opposite to the direction of the electric field at that point at an angle other than 0°, 90°, or 180° from the direction of the electric field at that point

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Ankur S

Numerade educator

Where an electric field line crosses an equipotential surface, the angle between the field line and the equipotential is 90°. between zero and 90°. zero. either A, B, or C. either A or C.

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Breanna Ollech

Numerade educator

Question 1 When a positive charge moves in the direction of the electric field, the field does positive work on it and the potential energy decreases. the field does zero work on it and the potential energy remains constant. the field does negative work on it and the potential energy decreases. the field does negative work on it and the potential energy increases. the field does positive work on it and the potential energy increases.

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Hana Y.