1. As the distance between two opposite magnetic poles
increases, the flux density midway between them
(1) decreases
(3) remains the same
(2) increases
6. The diagram below represents magnetic lines of force
within a region of space.
2. In which diagram below is the magnetic flux density at
point P greatest?
(1)
(3)
(2)
(4)
3. The diagram below shows the magnetic field that results
when a piece of iron is placed between unlike magnetic
poles.
The magnetic field is strongest at point
(1) A
(3) C
(2) B
(4) D
7. The diagram below represents the magnetic lines of force
around a bar magnet.
At which point is the magnetic field strength greatest?
(1) A
(3) C
(2) B
(4) D
4. The diagram below represents lines of magnetic flux within
a region of space.
At which point is the magnitude of the magnetic field
strength of the bar magnet the greatest?
(1) A
(3) C
(2) B
(4) D
8. In the diagram below, what is the direction of the magnetic
field at point A?
The magnetic field strength is greatest at point
(1) A
(3) C
(2) B
(4) D
5. The field around a permanent magnet is caused by the
motions of
(1) nucleons
(3) neutrons
(2) protons
(4) electrons
(1)
(2)
(3)
(4)
to the left
to the right
toward the top of the page
toward the bottom of the page
9. In the diagram above, what is the direction of the magnetic
field at point P?
(1) toward A
(2) toward B
14. Which diagram best represents the magnetic field between
two magnetic north poles?
(1)
(3)
(2)
(4)
15. In the diagram below, a steel paper clip is attached to a
string, which is attached to a table. The clip remains
suspended beneath a magnet.
(3) toward C
(4) toward D
10. The diagram at the below represents a bar magnet.
The direction of the magnetic field at point P is toward
point
(1) A
(3) C
(2) B
(4) D
11. Which diagram best represents the lines of magnetic flux
between the ends of two bar magnets?
(1)
(3)
As the magnet is lifted, the paper clip begins to fall as a
result of
(1) an increase in the potential energy of the clip
(2) an increase in the gravitational field strength near the
magnet
(3) a decrease in the magnetic properties of the clip
(4) a decrease in the magnetic field strength near the clip
16. Which diagram best represents the magnetic field near the
poles of a horseshoe magnet?
(2)
(4)
12. The presence of a uniform magnetic field may be detected
by using a
(1) stationary charge
(3) beam of neutrons
(2) small mass
(4) magnetic compass
13. Magnetic fields are produced by
(1) motion of electric charges
(2) static electric charges
(3) photon motion
(4) gamma radiation
(1)
(3)
(2)
(4)
17. The diagram below shows a compass placed near the north
pole, N. of a bar magnet.
19. Base your answer to the following question on the diagram
below which represents an electromagnet. The arrows
indicate the direction of the magnetic field.
Which diagram best represents the position of the needle of
the compass as it responds to the magnetic field of the bar
magnet?
(3)
What is the polarity of K?
(1) north
(2) south
(1)
(4)
(3) positive
(4) negative
20. In the diagram below, steel paper clips A and B are attached
to a string, which is attached to a table. The clips remain
suspended beneath a magnet.
(2)
18. Which diagram correctly shows a magnetic field
configurations?
(1)
(2)
Which diagram best represents the induced polarity of the
paper clips?
(3)
(1)
(3)
(2)
(4)
(4)
21. A compass is located at point X near a bar magnet as shown
in the diagram below.
Which diagram shows the proper direction of the compass
needle?
(1)
24. Which diagram below best represents the magnetic field
near a bar magnet?
(1)
(2)
(3)
(3)
(2)
(4)
22. A student sprinkled iron filings around a bar magnet and
observed that the filings formed the pattern shown below.
(4)
25. The diagram below shows the lines of magnetic force
between two north magnetic poles.
The magnetic field is strongest at point
(1) A
(3) C
(2) B
(4) D
23. The diagram below shows a bar magnet.
Which arrow best represents the direction of the needle of a
compass placed at point A?
(1) ↑
(3) →
(2) ↓
(4) ←
At which point is the magnetic field strength greatest?
(1) A
(3) C
(2) B
(4) D
26. Which diagram best represents magnetic flux lines around a
bar magnet?
(1)
(2)
(3)
28. If the iron core is removed, the magnetic field strength in
the solenoid will
(1) decrease
(3) remain the same
(2) increase
29. If the number of turns in the coil is increased and the
current kept constant, the magnetic field strength of the
solenoid will
(1) decrease
(3) remain the same
(2) increase
Base your answers to questions 30 through 32 on the diagram
below which represents a circuit containing a solenoid on a
cardboard tube, a variable resistor R, and source of potential
difference.
(4)
Base your answers to questions 27 through 29 on the diagram
below shows a circuit containing a solenoid with an iron core.
30. If the resistance of the variable resistor R is increased, the
magnetic field strength of the solenoid will
(1) decrease
(3) remain the same
(2) increase
31. If a soft iron rod is placed in the cardboard tube, the
magnetic field strength of the solenoid will
(1) decrease
(3) remain the same
(2) increase
32. If the number of turns in the solenoid is increased and the
current is kept constant, the magnetic field strength of the
solenoid will
(1) decrease
(3) remain the same
(2) increase
27. If the resistance of the variable resistor R is decreased, the
magnetic field strength of the solenoid will
(1) decrease
(3) remain the same
(2) increase
Answer Key
[New Exam]
1.
1
31.
2
2.
4
32.
2
3.
3
4.
2
5.
4
6.
3
7.
1
8.
2
9.
2
10.
3
11.
1
12.
4
13.
1
14.
1
15.
4
16.
1
17.
4
18.
3
19.
1
20.
4
21.
2
22.
1
23.
3
24.
2
25.
2
26.
4
27.
2
28.
1
29.
2
30.
1