Question

1. Which of the following statements about the direction of a magnetic force is always true?...

1. Which of the following statements about the direction of a magnetic force is always true? (Note: More than one answer choice may be correct)
a)The direction of the magnetic force on a moving charged particle is parallel to the direction of the external magnetic field.
b)The direction of the magnetic force on a moving charged particle is parallel to the direction of the charged particle's velocity.
c)The direction of the magnetic force on a moving charged particle is perpendicular to the direction of the external magnetic field.
d)The direction of the magnetic force on a moving charged particle is perpendicualr to the direction of the charged particle's velocity.

2. Which of the following statements is NOT TRUE concerning the creation of magnetic fields?
a)A permanent magnet creates a magnetic field at all points in space around it.
b)A distribution of electric charges at rest creates a magnetic field at all points in space around it.
c)A moving electric charge creates a magnetic field at all points in space around it.
d)An electric current creates a magnetic field at all points in space around it
e)All of the above statements are true.

3. When a standard bar magnet (made of billions of atoms and molecules) is cut exactly in half, each piece always becomes a smaller bar magnet that has its own magnetic North and South poles
a) TRUE
b) FALSE

4. The magnitude of the magnetic field a certain distance away from a long, straight conductor (e.g. a wire) is B. What is the magnitude of the magnetic field at half the distance away from the conductor?
a) 4B
b) 2B
c) B
d) B/2
e) B/4

5. Permanent magnets attract ALL metals through ferromagnetism
a) TRUE
b) FALSE

6. What is the standard unit of magnetic field?
a) Tesla (T)
b)Netwon-Coulomb (N•C)
c)Weber (Wb)
d)Gauss (G)

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