Activity 3: Problem Solving Suppose there is an isolated charge (+1.5x10-19C) that is displaced from point A to B due to the electric force. As the charge moves, it produces an electric field which has a magnitude of 6.9 N/C. Find the work done by the electric force of the charge if it moves 1.5 m from its original position. A в |||| | + + + + +

Learning Goal: To understand the relationship and differences between electric potential and electric potential energy. In this problem we will learn about the relationships between electric force F, electric field Ē, potential energy U, and electric potential V. To understand these concepts, we will first study a system with which you are already familiar: the uniform gravitational field. Part B Now find the gravitational potential energy U (z) of the object when it is at an arbitrary height z. Take zero potential to be at position z = 0. Keep in mind that the potential energy is a scalar, not a vector. Express U (2) in terms of m, z, and g. U (z) = Submit ΨΕ ΑΣΦ Request Answer ?

O West -1.36 x 10-3 J zero South A charge of 42.0 nC is placed in a uniform electric field that is directed towards the west direction and has a magnitude of 5.40 x 104 V/m. What work is done by the electric force when the charge moves a distance of 1.50 m in the direction 53° south of west? North -2.05 x 10-3 J 3.40 x 10-3 J East

Consider a proton moving from point A to point B towards two positive charges as illustrated below. Select all correct statements regarding the work involved for this action. B A Positive work is done by the electric field. Negative work is done by the electric field External (positive) works needs to be applied. +

QUESTION 2 How much work does a uniform electric field of strength, 3,000 N/C, perform on a +2.0-uC point charge that moves a distance of 30 cm in the direction of the electric field? a. 1.8 mJ b. 2.4 mJ С. 3.0 mJ d. 3.6 mJ Ое. 4.2 mJ

A uniform electric field of magnitude 9.8x105 N/C points in the positive a direction. Find the change in electric potential energy of a 9.5-μC charge as it moves from the origin to the point (0, 6.0 m). Express your answer using one significant figure. AU = Submit Part B AU = — ΑΣΦΑΛΟ Submit V Request Answer Find the change in electric potential energy of a 9.5-μC charge as it moves from the origin to the point (6.0 m, 0). Express your answer using two significant figures. VE ΑΣΦ Ć Request Answer ? ? J J

A homemade capacitor is assembled by placing two 8-in. pie pans 6 cm apart and connecting them to the opposite terminals of a 9-V battery. Part A Estimate the capacitance. Express your answer using one significant figure. 国 C = 5.74 • 10 - 10 F Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining

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Figure 9 3.0 cm 14.0 cm 2.0 nC 2.0 nC 1 of 1 > Part A What is the electric potential at the point indicated with the dot in (Figure 1)? Suppose that q = -1.4 nC. Express your answer with the appropriate units. V = Submit HÅ Value Provide Feedback Request Answer Units ?

A small particle has charge -4.60 µC and mass 1.70x10-4 kg. It moves from point A, where the electric potential is VA = 300 V, to point B, where the electric potential VB = 820 V is greater than the potential at point A. The electric force is the only force acting on the particle. The particle has a speed of 6.00 m/s at point A. Part A What is its speed at point B? Express your answer in meters per second. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Electric force and electric potential. m/s Part B Is it moving faster or slower at B than at A? Faster Slower 圓