1. ____ magnetic polies atytract, and _____ magnetic poles repel.
A. like, opposite
B. Opposite, opposite
C. like, like
D. opposite, like
2. The shape of the magnetic field surrounding a current carrying wire is
A. a circle
B. a square
C. a rectangle
D. an oval
3. The strength of a magnetic field is measured in
A. a circle
B. a square
C. a rectangle
D. an oval
4. The force on an electronmoving at right angles through a magnetic field is
A. out of the palm according to the right hand rule.
B. out of the back of the hand according to the right hand rule
C. along the direction of the fingers according to the right hand rule
D. along the direction of the thumb according to the right hand rule
5. According the right hand rule of current along a straight wire,
A. your fingers curl around the wire in the direction of the magnetic field
B. your thumb points in the direction of the magnetic field
c. your fingers curl around the wire in the direction of the current.
d. none of these.
6. The field lines of a magnet
a. go out of the south pole to the north pole
b. go out of the east pole to the north pole
c. go out of the north pole to teh south pole
d. go out of the south pole to the west pole.