Two small charged particles have equal charges of + 1.0 nC. They are positioned so that their electrostatic potential energy is 1.8 nJ. Various positions for charge 1 (x1, y1) and charge 2 (x2, y2) are listed below. The positions are all given in meters. Match the positions that correspond to the potential energy. a. X2 = 1, y2 = 5 b. x2 = -5, y2 =0 C. X2 = 3, y2 = 0 d. X2 = 5, y2 =0 e. X2 = 3, y2 = 2 1. X1 = 0, y1 =0 a 2. X1 = 1, y1 =0 3. X1 = -2, y1 = 2 4. X1 = 0, y1 = -4 a 5. x1 = -10, y1 = 0 %3D

3. A capacitor with no dielectric material between the plates has a potential difference of 19V across it. The plates are separated by 3.7 mm. If the plates each hold charges of ±4.27nC: a. What is the capacitance? b. What is the area of each plate? c. What is the electric field between the plates? d. What is the energy stored in the capacitor? The power supply is disconnected leaving the +4.27nC trapped on each plate. The plates are then pulled apart to a separation of 6.0 mm: e. What is the new capacitance? f. What is the new potential difference between the plates?

The electric potential increases from 100 V to 800 V from the bottom plate to the top plate of a parallel-plate capacitor. a. What is the magnitude of the change in potential energy of a −3 × 10^−4 C charge that is moved from the bottom plate to the top plate? b. Does the potential energy increase or decrease in this process?

5. A capacitor is charged by a battery. It may or may not have been removed from this battery. A dielectric is then either inserted or removed from between the plates. The capacitance increased by a factor of 5 and the charge across the plates increased by a factor of 5. a. Was the capacitor on or off the battery? Explain. b. Was the dielectric inserted or removed from between the plates? Explain.

Charge q is fired through a small hole in the positive plate of a capacitor, as shown.a. If q is a positive charge, does it speed up or slow down inside the capacitor? Answer this question twice: (i) Using the concept of force. (ii) Using the concept of energy.b. Repeat part a if q is a negative charge.

Two 2.10 cm x 2.10 cm plates that form a parallel- plate capacitor are charged to ±0.708 nC. ▾ Part A What is the electric field strength inside the capacitor if the spacing between the plates is 1.30 mm? Express your answer with the appropriate units. E= Value Submit Request Answer Part B ? Units What is potential difference across the capacitor if the spacing between the plates is 1.30 mm ? Express your answer with the appropriate units. HÅ V = Value Units Submit Request Answer Part C ? What is the electric field strength inside the capacitor if the spacing between the plates is 2.60 mm ? Express your answer with the appropriate units. με E = Value Units Submit Request Answer Part D ? What is the potential difference across the capacitor if the spacing between the plates is 2.60 mm ? Express your answer with the appropriate units. ΜΑ ? V = Value Units Submit Request Answer Provide Feedback

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3. An electronic flash uses a 950 µF capacitor. When it is fully charged the potential difference between the plates is 290 V. a. Sketch the capacitor labeling the high potential side. b. What is the magnitude of the charge on each plate? How much energy is stored in the charged capacitor?

A particle, Q, with a charge of +10.8 nC is isolated from all other charged objects. Point A is 1.1 cm to the right of the charge. Point B is 1.1 cm below the charge. Point C is 3.9 cm to the left of the charge. a. What is the electric potential at points A, B, and C? b. What is the potential energy of an electron at each point in eV and joules? c. If an electron is placed at rest at point C, what will be the force on and acceleration of the electron (magnitude and direction)?