# PHYSICS 2 University of Wollongong Electric and Gravitational Forces Physics Questions

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Ebhqun

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physics 2

University of Wollongong

PHYSICS

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I have a task to do that contains 60 questions. you have to solve all the 60 questions and send me the steps of how to solve for each question. " solve and show your work ". you have to finish it before June 11.

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Physics 2 Bonus The following questions and problems are related to topics we covered in physics 2. Enjoy 😊! 1. Materials, such as glass, in which electric charges do not move freely are called electrical ____________________. 2. How does the electric force between two charged objects change when the distance between the two objects is doubled? Explain. 3. How does the electric force between two charged objects change when the charge on one of the objects is doubled? Explain. 4. Identify the types of elements in the schematic diagram above and the number of each type. 5. Draw a schematic diagram that contains three resistors and one battery. 6. Draw a schematic diagram that contains one battery, two resistors, one capacitor, and one closed switch wired as a series circuit. 7. How does the equivalent resistance of a series circuit compare to the resistance values of the individual resistances in the circuit? 8. A repelling force occurs between two charged objects when the charges are of ____________________. 9. In the diagram shown above, the circles represent small balls that have electric charges. Ball 1 has a negative charge, and ball 2 is repelled by ball 1. Next, you see that ball 2 repels ball 3 and that ball 3 attracts ball 4. What is the electric charge on ball 4? 10. The figure shown above demonstrates charging by ____________________. 11. Two point charges, initially 2 cm apart, are moved to a distance of 10 cm apart. By what factor does the resulting electric force between them change? 12. If the charge is tripled for two identical charges maintained at a constant separation, the electric force between them will be changed by what factor? 13. Two point charges, initially 1 cm apart, are moved to a distance of 3 cm apart. By what factor do the resulting electric and gravitational forces between them change? 14. A capacitor consists of two metal plates; ____ is stored on one plate, and ____ is stored on the other. 15. A 0.25 F capacitor is connected to a 9.0 V battery. What is the charge on the capacitor? 16. A parallel-plate capacitor has a capacitance of C F. If the area of the plates is doubled while the distance between the plates is halved, the new capacitance will be ____________________. 17. A 0.50 F capacitor is connected to a 12 V battery. Use the expression PE = C(V) to determine how much electrical potential energy is stored in the capacitor. 18. What is the potential difference across a 5.0 resistor that carries a current of 5.0 A? 19. A flashlight bulb with a potential difference of 4.5 V across it has a resistance of 8.0 . How much current is in the bulb filament? 20. If the potential difference across the bulb in a camping lantern is 9.0 V, what is the potential difference across the battery used to power it? 21. If a 9.0 V battery is connected to a lightbulb, what is the potential difference across the bulb? 22. Two resistors having the same resistance value are wired in parallel. How does the equivalent resistance compare to the resistance value of a single resistor? 23. What is the equivalent resistance of the resistors in the figure shown above? 24. Two resistors with values of 6.0  and 12  are connected in parallel. This combination is connected in series with a 4.0  resistor. What is the equivalent resistance of this combination? 25. What is the equivalent resistance for the resistors in the figure shown above? 26. What is the equivalent resistance for the resistors in the figure shown above? 27. Three resistors connected in parallel have individual values of 4.0 , 6.0 , and 10.0 , as shown above. If this combination is connected in series with a 12.0 V battery and a 2.0  resistor, what is the current in the 10.0  resistor? 28. What is the electric force between an electron and a proton that are separated by a distance of 3.4  10 m? Is the force attractive or repulsive? (e 1.60 10 C, k 8.99  10 N•m /C ) 29. What is the electric force between a proton and an alpha particle (charge 2e) that are separated by a distance of 4.5  10 m? (e 1.60  10 C, k 30. Two equal charges are separated by 2.6  10  10 8.99  10 N•m /C ) m. The force between the charges has a magnitude of 8.51 N. What is the magnitude of q on the charges? (k 8.99  10 N•m /C ) 31. A thundercloud has an electric charge of 48.8 C near the top of the cloud and –41.7 C near the bottom of the cloud. The magnitude of the electric force between these two charges is 7.98  10 N. What is the average separation between these charges? (k 8.99  10 N•m /C ) 32. Two point charges having charge values of 3.6 C and –5.2 C, respectively, are separated by 2.6 cm. What is the mutual force between them? (k 8.99  10 N•m /C ) 33. Two point charges are 4.8 cm apart and have values of 56.5 C and –56.5 C, respectively. What is the electric field at the midpoint between the two charges? (k 8.99  10 Nm /C ) 34. An electric field of 2715 N/C is produced by a charge of 4.68  10 the distance to the charge? ( C. For this field strength, what is 35. When an electron (q –1.6  10 C) moves 0.11 m along the direction of an electric field with a strength of 3.4 N/C, what is the magnitude of the potential difference between the electron’s initial and final points? 36. What is the capacitance of a parallel-plate capacitor made of two square aluminum plates that are 5.8 cm in length on each side and are separated by 7.7 mm? ( 8.85  10 C /Nm ) 37. A capacitor stores 8.1  10 of the capacitor in F? J of energy when it is connected to a 9.8 V battery. What is the capacitance 38. A 0.65 F capacitor holds 5.5 C of charge on each plate. How much potential energy is stored in the capacitor? 39. A 0.74 F capacitor holds 4.5 C of charge on each plate. What is the potential difference across the capacitor? 40. The potential difference across a resistor is 6.5  10 V. If the resistance of the resistor is 2.8 k, how much current does the resistor carry? 41. How much current is in a resistor of 227  if the potential difference across the resistor is 145 V? 42. A potential difference of 3.6 V is placed across a resistor, producing a current of 14.3 A. What is the resistance of the resistor? 43. A current of 9.1 A is produced in a resistor when a potential difference of 26.2 V is applied across the resistor. What is the resistance of the resistor? 44. When a potential difference of 11 V is placed across a resistor, the current in the resistor is 1.5 A. What is the resistance of the resistor? 45. A 1.4 k resistor has 0.012 A of current in it. What is the potential difference across the resistor? 46. A toaster is connected to a potential difference of 129 V and dissipates 0.54 kW in the form of electromagnetic radiation and heat. What is the resistance of the toaster? 47. A blow dryer is connected to a potential difference of 122 V. If the resistance of the blow dryer is 11.7 , how much power is dissipated in the form of electromagnetic radiation and heat? 48. Three resistors with values of 17 , 23 , 9 , respectively, are connected in series. What is their equivalent resistance? 49. Three resistors with values of 17 , 31 , 191 , respectively, are connected in series. What is their equivalent resistance? 50. Three resistors with values of 29 , 56 , 24 , respectively, are connected in series. What is their equivalent resistance? 51. A current of 0.12 A passes through a 5.1  resistor. The resistor is connected in series with a 9.1 V battery and an unknown resistor. What is the resistance value of the unknown resistor? 52. Three resistors are wired in series with a 28.5 V battery. The resistances are 21.2 , 37.6 , and 6.1 . What is the voltage across the 6.1  resistor? 53. Three resistors with values of 11 , 15 , 22 , respectively, are connected in parallel. What is their equivalent resistance? 54. Three resistors with values of 23 , 89 , 19 , respectively, are connected in parallel. What is their equivalent resistance? 55. Three resistors with values of 18.9 , 2.15 , 2.17 , respectively, are connected in parallel. What is their equivalent resistance? 56. Three resistors with values of 12 , 49 , 51 , respectively, are connected in parallel. What is their equivalent resistance? 57. What is the equivalent resistance for the resistors in the figure shown above? 58. What is the value of the unknown resistor in the circuit shown above if the equivalent resistance for the circuit is 21.14 ? 59. How much current is in one of the 10  resistors in the diagram shown above? 60. In the circuit shown above, the current in the 3.9  resistor is 0.27 A. What is the voltage of the battery?
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