1. The relationship between electricity and magnetism can be seen in all of the following EXCEPT: A) a battery converts chemical energy into electrical energy B) a magnet pushed inside a loop of wire produces current in the wire C) a compass needle is deflected when placed near a current carrying wire D) electric current set up in a coil of wire affects another coil placed near the first one
1. The relationship between electricity and magnetism can be seen in all of the following
EXCEPT:
A) a battery converts chemical energy into electrical energy
B) a magnet pushed inside a loop of wire produces current in the wire
C) a compass needle is deflected when placed near a current carrying wire
D)
2. The strength of a magnet is _____________.
A) greatest in the middle
B) the same all over
C) greatest at the poles
D) greatest at only one end
3. A magnet can be made by _______________.
A) heating an iron nail
B) rubbing an iron nail with a magnet
C) placing an iron nail in the earth
D) striking an iron nail
4. When a bar magnet is broken in half, _____________.
A) it loses its magnetism
B) both halves are magnets
C) one half has one pole and the other half has another pole
D) one half has two south poles and the other half has two north poles
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
A) I only
D) II and III only
B) I and II only
E) I, II, and III
C) I and III only
6. All magnets are characterized with _____________.
A) two south poles
B) a shape like a bar
C) permanent magnetism
D) a magnetic field around them
7. The total magnetic flux through a closed surface is _____________.
A) always maximum
B) dependent on the size of the closed surface
C) zero
D) infinite
8. A compass points to _____________.
A) geographic north B) geographic east C) magnetic north D) magnetic east
9. The motion of a charged particle under the action of a magnetic field alone is always motion
with ______________.
A) constant force B) constant speed C) constant velocity D) constant acceleration
10. The magnetic force on a current-carrying conductor depends on the following EXCEPT
A) current flowing in the conductor
B) mass of the conductor
C) length of the conductor
D) magnetic field
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
A) East
B) North
C) South
D) West
12. The magnetic field of a bar magnet most closely resembles of a
A) current carrying wire loop
B) horseshoe magnet
C) straight current carrying wire
D) stream of electrons moving parallel to one another
13. What angle should a current-carrying wire make an angle with the magnetic field for the
force to be maximum?
A) 0degrees
B) 45degrees
C) 90degrees
D) 120degrees
14. When a current-carrying wire is in uniform magnetic field with the direction of current the
same as that of the field,
A) there is a force on the wire that tends to move it parallel to the magnetic field
B) there is a force on the wire that tends to move it perpendicular to the magnetic field
C) there is a torque on the wire that tends to rotate it until the plane is perpendicular to the
field
D) there is neither a force nor a torque on the wire
15. The field/s surrounding a moving electric charge
A) depends on the space where the charge is moving
B) electric field
C) magnetic field
D) both electric and magnetic fields
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