1. [-/3 Points] DETAILS HRW10 24.P.006. MY NOTES PRACTICE ANOTHER When an electron moves from A to B along an electric field line in the figure below, the electric field does 3.22 x 10 1 j of work on it. Electric field line -Equipotentials What are the electric potential differences of the following? (a ) VB - VA (b ) VC - VAV ( c ) VC - VB 2. [-/3 Points] DETAILS HRW10 24.P.008. MY NOTES PRACTICE ANOTHER A graph of the x component of the electric field as a function of x in a region of space is shown in the figure below. The scale of the vertical axis is set by Exs = 50.0 N/C. The y and z components of the electric field are zero in this region. Suppose that the electric potential at the origin is 18 V Ex (N/C) x (m) (a) What is the electric potential at x = 2.0 m? (b) What is the greatest positive value of the electric potential for points on the x axis for which 0 s x s 6.0 m? (c) For what value of x is the electric potential zero? m1. [-/1 Points] DETAILS SERPSEWA10 26.WA.012. MY NOTES The amount of charge flowing through a particular point in a conductor is represented by the equation Q = at + bt + c, where a = 4.00 A/s , b = 5.00 A, and c = 6.00 A . s. Determine the current density at t = 0.500 s if the cross-sectional area of the conductor at the point of consideration is 2.60 cm A/m 2. [-/1 Points] DETAILS SERPSEWA10 26.WA.027. MY NOTES What power is supplied to the starter motor of a large truck that draws 220 A of current from a 20.2 V battery hookup? KW 3. [-/1 Points] DETAILS SERPSEWA10 27.WA.011. MY NOTES Find the total resistance of the combination of resistors shown in the figure below. (R1 = 0.500 HQ, R2 = 14.0 HQ, and R3 = 2.50 HQ.) K1 K2 R3 4. [-/4 Points] DETAILS SERPSEWA10 27.WA.017. MY NOTES Consider the circuit shown in the diagram below. The battery has a voltage V = 12.0 V and the resistors have the following values. R1 = 3.10 0; R2 = 6.20 0; R3 = 15.50 0; R4 = 9.30 0 How much current flows through each of the four resistors? I1 = A 12 = 13 = 14 D : R2 S 325. [-/6 Points] DETAILS SERPSEWA10 27.WA.006. MY NOTES An automobile starter motor has an equivalent resistance of 0.0550 0 and is supplied by a 12.0-V battery with a 0.0280-2 internal resistance. a) What is the current to the motor? (b) What voltage is applied to it? (c) What power is supplied to the motor? KW (d) Repeat these calculations for when the battery connections are corroded and add 0.0900 n to the circuit. (Significant problems are caused by even small amounts of unwanted resistance in low-voltage, high-current applications. ) V = P = KW 6. [-/1 Points] DETAILS BAUERPHYS2 27.P.024. MY NOTES A proton moving with a speed of 3.5 x 105 m/s in the positive y-direction enters a uniform magnetic field of 0.34 T pointing in the positive x-direction. Calculate the magnitude of the force on the proton. 7. [-/1 Points] DETAILS BAUERPHYS2 27.P.025. MY NOTES The magnitude of the magnetic force on a particle with charge -2e moving with speed v = 1.4 x 105 m/s is 3.9 x 10-18 N. What is the magnitude of the magnetic field component perpendicular to the direction of motion of the particle? 8. [-/2 Points] DETAILS BAUERPHYS2 27.P.027. MY NOTES A particle with a charge of 20 JC moves along the x-axis with a speed of 44 m/s. It enters a magnetic field given by B = 0.32y + 0.632, in teslas. Determine the magnitude and the direction of the magnetic force on the particle. magnitude direction . counter-clockwise from the +y-axis in the yz-plane