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Newest Electricity and Magnetism Questions

1. A student is using two neutral conducting spheres with equal negative and positive charges. She wants to separate the charges of
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2. Object A has a charge of –1 Coulomb. At a given distance, the object with which charge would be most strongly attracted by
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   2. asked by I_EAT_EVERYDAY
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3. An illustration with 3 positively charged spheres. q Subscript 1 baseline and q Subscript 2 baseline are on the y-axis and
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4. How does the Coulomb force affect charge interactions?(1 point)Responses Like charges attract, and opposite charges repel. Like
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5. Two balloons are rubbed with wool, giving each a negative charge. The balloons are then attached to a table using tape and
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   2. asked by as
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6. Figure 4 below shows three points that have a perpendicular layout. Charge Qxwith a magnitude of +5nC, lies west 20cm of Qw
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7. You are provided with three capacitors with capacitance 4F, 3F, 2F, respectively.What is the maximum capacitance which can be
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   2. asked by Rukia
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8. Calculate the resistance of a copper cable which is 500meters long, it's cross sectional area is 2m^2, the resistivity is
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   2. asked by Anita Miyanda
   3. 24 views
9. The head lamp of a car takes a current of 0.4A from a 12v supply energy produce in 5m is
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   2. asked by Aghwadje Lucky
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10. An alternating emf is represented by e=420sin(942,478t) volts. Calculatea)frequency of the emf b) periodic time c) instantaneous
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11. Define cycle, period,rms value and average value
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12. Consider a block of copper that is a rectangular prism (a box) with sides 15 cm by 20 cm by 50 cm. The resistivity of copper is
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13. An electric motor powered by a 240V mains supply requires of 30A to lift a load of mass 3 tonnes at the rate of 5m per minute.Ca
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    2. asked by Symon Pensen
    3. 41 views
14. What is the resistance of a wire if it balances a standard resistor of 5 ohms at the 56 cm from the end of the meter-bridge?Help
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    2. asked by Symon Pensen
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15. Three charges are placed on the xy_plane Q1=2uc at (0,0.3) ,Q2=4uc at (0,-0.3) and Q3= 5uc at (0.4,0),what's the magnitude and
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    2. asked by Anbasse Ahmed
    3. 34 views
16. Equal charges of 8uc are placed of the three corners of an equilateral triangle 2m on a side calculated the magnitude and
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    2. asked by Anbasse Ahmed
    3. 80 views
17. Which of the following represents the magnitude of the potential (voltage) V as a function of r, the distance from the center of
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18. Which of the following represents the magnitude of the potential (voltage) V as a function of r, the distance from the center of
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19. A current transformer has two turns on the primary winding and a secondarywinding of 260 turns. The secondary winding is
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20. A solar cell as reverse dark current of 10^-13A and photocurrent of 0.04A. The potential drop produce from this cell is 0.7V at
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    2. asked by Mezaah
    3. 39 views
21. A solar cell as reverse dark current of 10^-3 A and photocurrent of 0.04A. The potential drop produce from this cell is 0.7V at
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    2. asked by Mezaah
    3. 41 views
22. Circuit A has a voltage of 10 V, and circuit B has a voltage of 15 V. Which statement about the circuits is correct?(1 point)Res
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23. Why is glass a good insulator?(1 point)Responses The atoms in glass hold on tightly to their positively charged particles. The
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24. When two charged particles are moving toward each other their velocities decrease until they eventually become to a stop what
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25. In an experiment, you observe two charged objects that are attracting each other. Which factor could you change to decrease the
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26. 11. A student connects a battery to a wire and wraps the wire around an iron nail to produce an electromagnet. Which action
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27. Two charges are fixed on the x-axis. Charge q1 is +4.0 uC and is fixed at x = 0.0 cm. Charge 2 is fixed at x = 18 cm, but the
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28. What produces the magnetic force of an electromagnet?(1 point)Responses positive and negative charges repelling each other
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29. Supposed you have two parallel conductors A ,B separated by 20 cm apart from each other as shown. If both carrying current i1
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    2. asked by Eso Furu
    3. 40 views
30. A straight line wire moving down through a magnetic field, will the induced current flows from which direction?
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    2. asked by Eso Furu
    3. 32 views
31. An electric current moves through a circuit that makes a complete loop. How will the amount of electrical energy change as the
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32. A student observes interactions between two sets of electrically charged objects. In each set, the objects carry either a charge
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33. An electric appliance draws 3 amperes of current when it is connected to a 24-volt source. What is the resistance of this
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34. Describe how resistance affects the flow of current in a circuit.Responses Efficiency of a circuit is dependent on decreasing
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35. What happens to the force when charges are decreased?
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36. Complete the statement with the choices provided.increases as a conductor increases in temperature, becomes thinner, or becomes
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37. What happens to the magnetic field when AC is used?
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38. In one or two sentences explain how magnetic fields and electric currents relate to each other
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39. 2. Use the table to answer the question.Electromagnet: p Current Intensity: medium Number of Turns: 20 Electromagnet: q Current
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40. Use the table of information about four electromagnets to answer the question.Electromagnet: w Current Intensity: medium Number
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41. according to coulombs law the amount of eletric force depends on which TWO things?
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42. When there is an electric current in a wire,in what direction would the magnetic field point?Options are Around the wire In the
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43. what is the relationship between the strength of an electromagnet and the number of turns in the coil?a As the number of turns
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44. In an experiment, you observe two charged objects that are attracting each other. Which factor could you change to decrease the
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45. what device changes, mechanical energy to electrical energy by rotating a coil of wire through a magnetic fielda Electromagnet b
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46. if the current a wire is directed upward, what is the direction of the magnet field produced by the current?a Clockwise in the
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47. what happens to a current carrying wire in a magnetic field if the current is reversed?a The wire will be deflected
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48. A magnetic field is created bya A strong current b A change in the current of a wire c Electromagnetic pulses d Moving electric
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49. walking across a carpet can build up a charge bya friction b induction c contact
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50. A power tool uses about 12 A of current and has a power rating of 1440 W. What voltage does the tool requirea 1552 V b 17280 V c
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51. Three charge particles are arranged on corners of a square as shown in figure, which charge -q on both the particle at the upper
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52. A parallel plate capacitor has a capacitance of 500pf and a charge of magnitude 0.25uc on each plate. What is the potential
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53. When two charged particles are moving toward each other, their velocities decrease until they eventually come to a stop. What
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    2. asked by u dont know me
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54. The nature of the electrostatic force between two small spheres of charges q1=-5uc and q2=-1.6uc respectively is what
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55. Find the magnitude of the electric field for a charge of 3.2 nC at a distance of 2.5 m.
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56. Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of
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    2. asked by ii
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57. Select the tab labeled “Pickup Coil” at the top of the page. Move the bar magnet right and left THROUGH the coil of wire.
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58. Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of
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    2. asked by ii
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59. The magnitude of the potential differencebetween the two plates is 1.2 103 V. The distance between the plates is 0.12 m. (a) At
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60. An a particle has a positive charge of 2e and a mass of 6.61027 kg. With what velocity would an a particle reach the negative
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61. The following circuit contains a battery and six identical resistors. If the battery provides a 12 V electromotive force and the
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62. If the battery provides a 12 V electromotive force and the resistors are each 10Ω, what is the current going through the
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63. Consider a block of copper that is a rectangular prism (a box) with sides 15 cm by 20 cm by 50 cm. The resistivity of copper is
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64. Consider a block of copper that is a rectangular prism (a box) with sides 15 cm by 20 cm by 50 cm. The resistivity of copper is
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    2. 35 views
65. According to Coulomb's Law, the amount of electric force depends on which two things?a. the size of the charge on each of the
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    2. 39 views
66. Complete the statement with the choices provided.(1 point) blank increases as a conductor increases in temperature, becomes
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    2. 34 views
67. According to Coulomb's Law, the amount of electric force depends on which two things?a the size of the charge on each of the two
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    2. asked by e
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68. Which of the following will decrease the electrical force between two charges? (Select the 2 correct answers.)a decreasing the
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    2. asked by e
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69. According to Coulomb's Law, the amount of electric force depends on which two things?a the size of the charge on each of the two
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70. Based on the arrangement of the electric field lines in the diagram, what are the charges and how are they interacting?a They
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71. Using Coulomb's Law, if the distance between two charged objects is decreased, what happens to the electric force between them?a
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72. Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of
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    2. 27 views
73. What produces the magnetic force of an electromagnet?(1 point)Responses movement of charged particles through the wire movement
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74. 1. There are two objects, one with a +2 charge and one with a -2 charge. If * 1 point we increase the distance between the two
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75. 4. An electromagnet is created by wrapping a wire conductor around a metal core and sending a current through it. If the number
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76. Which statement about the force of an electromagnet’s magnetic field is correct?a. Increasing the speed of the charge
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77. What is the electric field strength at a distance of 10 cm from a charge of 2 C?
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78. What is the magnitude of a point charge that would create an electric field of 1.00 N/C at points 1.00 m away
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79. An electron is moving in the +x-direction with a speed of 5.0x10^6 m/s. There is an electric field of 3.0kV/m in the
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80. Two pith balls hang from strings. The strings are attached to a bar, 6 centimeters apart. One ball has a positive charge, and
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81. How is a magnetic field produced?(1 point)Responses when an object has an electric charge when an object has an electric charge
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    2. asked by you isn't getting my name
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82. How far apart must two point charges of 75.0 nC (typical of static electricity) be to have a force of 1.00 N between them?
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83. Object A has a charge of –1 Coulomb. At a given distance, the object with which charge would be most strongly attracted by
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84. 2. A step-down transformer has 200 turns of wire in its primary coil. Howmany turns are in the secondary coil if the input
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85. Use the image to answer the question.A diagram shows a wire carrying a current in vertical direction. The magnetic field drawn
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86. What will happen to the magnetic force of the electromagnet if the intensity of the current traveling through the coil wire is
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    2. asked by young hell born demon
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87. what is Strength Of Magnetic Forces
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88. Which particles move freely in a conductor?
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89. The illustration depicts a circuit containing two resistors.What is the magnitude of the current passing through the ammeter
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    2. asked by >_>
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90. Derive a statement stating the relationship between number of resistors ,the effective resistance of the circuit and the total
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    2. asked by Andisiwe
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91. 18. The most accurate instrument for comparing the e.m.f of two cells is the..19. Which of the following devices may be used to
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    2. asked by Abdulrazak umar UsmanThree point charges Q+10x10-1
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92. 10. The maximum electric intensity outsis the surface of an isolated spherical conductor is 3x 10%/m. Calculate the maximum
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    2. asked by Abdulrazak umar UsmanThree point charges Q+10x10-1
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93. 3. Two small spheres of charge \( +5.0 \mu \mathrm{C} \) and \( -4.0 \mu \mathrm{C} \) are separated by a distance of \( 2.0
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94. The current in a circuit is halved. What happens to the resistance?(1 point) V = IR The resistance stays the same. The
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95. Aluminum allows for the flow of electrons while glass does not what an aluminum wire surrounded by glass being effective design
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    2. asked by Carrissa Mink
    3. 41 views
96. A beam of ion passed through two parallel horizontal plates 2.5cm apart have a pd of 2500v when a perpendicular magnetic field
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97. Object A has a charge of –1 Coulomb. At a given distance, the object with which charge would be most strongly attracted by
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98. Using the equation for Coulomb's Law, what happens to the force between two objects when you double the distance between them?
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99. Circuit A has a resistance of 7.5 ohms, and circuit B has a resistance of 5 ohms. Which statement about the circuits must be
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    2. 25 views
100. Object A has a charge of –1 Coulomb. At a given distance, the object with which charge would be most strongly attracted by
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     2. asked by winter<3
     3. 45 views