20 C 30 b

The potential in a region between x = 0 and x = 6.00 m is V = a + bx, where a = 15.8 V and b = -6.70 V/m. (a) Determine the potential at x = 0. V Determine the potential at x = 3.00 m. V Determine the potential at x = 6.00 m. V (b) Determine the magnitude and direction of the electric field at x = 0. V/m magnitude direction |---Select--- ✓ Determine the magnitude and direction of the electric field at x = 3.00 m. magnitude V/m direction ---Select--- ✓ Determine the magnitude and direction of the electric field at x = 6.00 m. magnitude V/m direction --Select--- ✓

The potential in a region between x = 0 and x = 6.00 m is V = a + bx, where a = 20.0 V and b = -6.50 V/m. (a) Determine the potential at x = 0. V Determine the potential at x = 3.00 m. Determine the potential at x = 6.00 m. V (b) Determine the magnitude and direction of the electric field at x = 0. V/m magnitude direction ---Select--- Determine the magnitude and direction of the electric field at x = 3.00 m. magnitude V/m direction ---Select--- O Determine the magnitude and direction of the electric field at x = 6.00 m. magnitude V/m direction --Select---

When an electron moves from A to B along an electric field line in the figure, the electric field does 5.70 × 10-19 J of work on it. What are the electric potential differences (a)VB - VA, (b)Vc - VA, and (c)Vc - VB? (a) Number i (b) Number (c) Number i Electric field line Units Units Units Equipotentials

The figure shows an object with positive charge and some equipotential surfaces (the dashed lines) A, B, C and D generated by the charge. What are the possible potential values of those surfaces? O A=189 V, B = 540 V, C = 933 V and D 1580 V O A=540 V; B = 333 V; C = 2500V and D = 198 V O A1580, B = 970 V, C = 540 V and D = 189 V O A = 2500 V; B = 100 V; C = 900; D = 390 V O None of the choices is correct.

Calculate the potential difference between points a and b () in Figure

A lightning storm approaches an area where the electric potential from the cloud to the ground is 1.5 (10)' v. The distance to the ground is 50 meters. A discharge (a lightning strike) delivers 20 C of charge to the ground. How much energy is contained in the discharge? O 3 (10)8 ) O 7.5(10)5 J O 3(10)5J O 1.5(10)10)

A potential difference exists between the inner and outer surfaces of the membrane of a cell. The inner surface is negative relative to the outer surface. If 1.35 x 10-20 J of work is required to eject a positive sodium ion (Na+) from the interior of the cell, what is the magnitude of the potential difference between the inner and outer surfaces of the cell? magnitude of the potential difference: 84.38 Incorrect

10 of 35 > Under certain circumstances, potassium ions (K*) in a cell will move across the cell membrane from the inside to the outside. The potential inside the cell is -65.5 mV and the potential outside the cell is zero. What is the change in the electrical potential energy of a single potassium ion as it moves across the membrane? change in potential energy: J Does the potential energy of the potassium ions increase, decrease, or remain the same as the ions move from the inside to the outside? O decrease O increase O remain the same

How much work is done (by a battery, generator, or some other source of potential difference) in moving Avogadro's number of electrons from an initial point where the electric potential is 6.50 V to a point where the electric potential is -8.10 V? (The potential in each case is measured relative to a common reference point.)Two insulating spheres have radii 0.300 cm and 0.500 cm, masses 0.150 kg and 0.700 kg, and uniformly distributed charges of -2.00 µC and 3.50 µC. They are released from rest when their centers are separated by 1.00 m. (a) How fast will each be moving when they collide? (Hint: Consider conservation of energy and of linear momentum.) m/s (lighter sphere) m/s (heavier sphere)