Pre-Lecture Quiz #6 – Flashcards

Which of the following statements are true concerning the creation of magnetic fields? a. A single stationary electric charge creates a magnetic field at all points in the surrounding region. b. A moving electric charge creates a magnetic field at all points in the surrounding region. c. A distribution of electric charges at rest creates a magnetic field at all points in the surrounding region. d. An electric current in a conductor creates a magnetic field at all points in the surrounding region. e. A permanent magnet creates a magnetic field at all points in the surrounding region.

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?

A charged 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?

Which of the following statements are true for magnetic force acting on a current-carrying wire in a uniform magnetic field? a. The magnetic force on the current-carrying wire is strongest when the current is parallel to the magnetic field lines. b. 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. c. The magnetic force on the current-carrying wire is strongest when the current is perpendicular to the magnetic field lines. d. 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 field 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?

A long, straight, vertical wire carries a current upward. Due east of this wire, in what direction does the magnetic field point?