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. Question 1 B 3 pts '0 1 G) Details An electric field in some region is described by the equation E=6.9 - 7.4 X4, where the electric field has units of WC and X has units of meters. The electric potential is set to O at x=0. What is the formula for electric potential as a function of position? The concept of voltage (electric potential) is helpful in cases where we think about potential energy. In fact, if you multiply the change in voltage by the value of the charge on a particle, the result is the change in potential energy of the particle. To demonstrate, imagine a particle with mass m : 7.2 X 104 kg and a charge of q : +3.2 X 106 C. At the origin this particle has a velocity of v : 6.6 m/S. What is the kinetic energy of the particle at the origin? J A short time later the particle is at m : 4.55 111. What is the voltage at the new location? V What is the electric potential energy for the particle? J What is the particle's kinetic energy at that position? J What is its speed? m/s Check