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Electrostatics
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Electrostatics
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20 Questions

1. An electron in an electric field experiences a force of 1 × 106 N opposite the direction of the field. What is the magnitude of the electric field?
2. [For Physics C Students Only] The dotted arrows in this figure depict a uniform electric field. Five wires are depicted by the thick lines labeled A through E. The wires cut through the field. Which of the following represents the electric flux through the wires from least to greatest?
3. When a 0.05-C charge is placed in a field and experiences 100 J of potential energy, what is the voltage?
4. A 0.1-C charge is located 3 m away from a point charge. What is the electric potential?
5. An electron is in an electric field surrounding a positive charge. It sits at an equipotential line of 20 V. What happens when it moves to another equipotential line of 40 V if the two lines are 0.5 m apart?
6. A negatively charged object is placed against a neutral object and becomes attracted to one side. Which of the following is true?
7. How much charge is on each plate of a 1-μF capacitor when a 12.0-V power supply is hooked up to it?
8. A 20-kg crate slides horizontally on a floor at 0.5 m/s and comes to rest in 25 s. What is the rate of thermal energy transferred between the crate and the floor by friction?
9. When a 0.05-C charge is placed in a field and experiences 100 J of potential energy, what is the voltage?
10. In this figure, a beam of particles is shot through two electric fields at a target. Both electric fields are uniform and directions are indicated by the arrows. Which of the following particles will reach the target?
11. Two parallel plates have a 120-V potential difference across them and produce a uniform electric field of 1.2 × 106 V/m. How far apart are the plates?
12. A 0.2-C charge is in an electric field. It feels like a force of 100 N. What is the strength of the electric field?
13. [For Physics C Students Only] The dotted arrows in this figure depict a uniform electric field. Five wires are depicted by the thick lines labeled A through E. The wires cut through the field. Which of the following represents the electric flux through the wires from least to greatest?
14. A 1-g object with a charge of −0.5 C is at rest. A uniform electric field of 10 N/C is applied to it. The field is oriented to the right. What will be the acceleration of the object in the field?
15. In this figure, a beam of particles is shot through two electric fields at a target. Both electric fields are uniform and directions are indicated by the arrows. Which of the following particles will reach the target?
16. A 0.1-C charge is located 3 m away from a point charge. What is the electric potential?
17. Two parallel plates are separated by 1 mm. The area of the plates is 1 cm2 and there is nothing but free space between the plates. What is the capacitance?
18. How much charge is on each plate of a 1-μF capacitor when a 12.0-V power supply is hooked up to it?
19. A 100-μF capacitor is charged by a 1.5-V battery. How much charge is stored on each plate?
20. Two protons are 1 μm apart. What is the electric force between them?

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