1. The relationship between electricity and magnetism can be seen in all of the following EXCEPT
a battery converts chemical energy into electrical energy
2. The strength of a magnet is _____________.
greatest at the poles
3. A magnet can be made by _______________.
heating an iron nail
4. When a bar magnet is broken in half, _____________.
both halves are magnets
5. Which determines the direction of the force on a current-carrying
wire in a magnetic field?
I. direction of current in the
wire
II. amount of current in the wire
III. direction of
magnetic field
I and III only
6. All magnets are characterized with _____________.
a magnetic field around them
7. The total magnetic flux through a closed surface is _____________.
zero
8. A compass points to _____________.
geographic north
9. The motion of a charged particle under the action of a magnetic field alone is always motion with ______________.
constant speed
10. The magnetic force on a current-carrying conductor depends on the following EXCEPT
mass of the conductor
11. A current is flowing west along a power line. If we neglect the earth’s field, the direction of the magnetic field below it is
south
12. The magnetic field of a bar magnet most closely resembles of a
straight current carrying wire
13. What angle should a current-carrying wire make an angle with the magnetic field for the force to be maximum?
90 degrees
14. When a current-carrying wire is in uniform magnetic field with the direction of current the same as that of the field,
there is neither a force nor a torque on the wire
15. The field/s surrounding a moving electric charge
both electric and magnetic fields