Magnetism

Which of the following statements are true? Check all that apply. O Earth's geographic north pole is actually a magnetic south pole. O Earth's geographic south pole is also a magnetic south pole. The north poles of two bar magnets will attract each other. The north pole of a bar magnet will attract the south pole of another bar magnet. Scientists have evidence that single isolated magnetic poles, called magnetic monopoles, exist. O The south poles of two bar magnets will repel each other.Which of the following statements are true concerning the creation of magnetic fields? Check all that apply. A moving electric charge creates a magnetic field at all points in the surrounding region. An electric current in a conductor creates a magnetic field at all points in the surrounding region. A single stationary electric charge creates a magnetic field at all points in the surrounding region. A permanent magnet creates a magnetic field at all points in the surrounding region. [:JCJCJCJC] A distribution of electric charges at rest creates a magnetic field at all points in the surrounding region. Which of the following statements are true for magnetic field lines? Check all that apply. At every point in space, the magnetic field vector at that point is tangent to the magnetic field line through that point. Unlike electric field lines, magnetic field lines are continuous. Magnetic field lines can never intersect. Magnetic field lines are close together in regions of space where the magnitude of the magnetic field is weak, and they are father apart in regions where it is strong. Magnetic field lines point in the direction of the magnetic force acting on a charge.Consider a magnetic force acting on an electric charge in a uniform magnetic field. Which of the following statements are true? Check all that apply. C] An electric charge moving perpendicular to a magnetic field experiences a magnetic force. C] A magnetic force is exerted on a stationary electric charge in a uniform magnetic field. The direction of the magnetic force acting on a moving electric charge in a magnetic field is perpendicular to the direction of motion. The direction of the magnetic force acting on a moving charge in a magnetic field is perpendicular to the direction of the magnetic field. An electric charge moving parallel to a magnetic field experiences a magnetic force. [:JCJCJCJ A magnetic force is exerted on an electric charge moving through a uniform magnetic field. An electron is traveling horizontally toward the north in a uniform magnetic field that is directed vertically downward. In what direction does the magnetic force act on the electron? O upward 0 east west downward South 0000 nonh Acharged particle enters into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, what type of path will the particle follow? O The charged particle will follow a straight-line path. O The charged particle will follow a circular path. O The charged particle will follow a spiral path. 0 The charged particle will follow a parabolic path. Which of the following statements are true for magnetic force acting on a current-carrying wire in a uniform magnetic field? Check all that apply. C] The magnetic force on the current-carrying wire is strongest when the current is parallel to the magnetic field lines. C] The direction of the magnetic force acting on a current-carrying wire in a uniform magnetic field is perpendicular to the direction of the field. E] The magnetic force on the current-carrying wire is strongest when the current is perpendicular to the magnetic field lines. C] The direction of the magnetic force acting on a current-carrying wire in a uniform magnetic field is perpendicular to the direction of the current. The magnitude of the magnetic eld at a certain distance from a long, straight conductor is represented by B. What is the magnitude of the magnetic field at twice the distance from the conductor? At twice the distance, the magnitude of the field is 3/2. At twice the distance, the magnitude of the field is 43. At twice the distance, the magnitude of the field remains equal to B. At twice the distance, the magnitude of the field is 3/4. 00000 At twice the distance, the magnitude of the field is 2B. A long, straight, vertical wire carries a current upward. Due east of this wire, in what direction does the magnetic field point? east O downward O south O upward O north westTwo long parallel wires are placed side by side on a horizontal table. The wires carry equal currents in the same direction. Which of the following statements are true? Check all that apply. C] The magnetic field is a maximum at a point midway between the two wires. C] The magnetic force between the two wires is attractive. C] The magnetic field at a point midway between the two wires is zero. C] The magnetic force between the two wires is repulsive