Download SPH 3U(G) TEST

SPH 3U(G) TEST
ELECTRICITY AND MAGNETISM: Chapter 13 and 14
Mr. Moors
45 marks
Magnetism and Electricity
1.
On the diagram below accurately show the magnetic field lines around the bar magnet and
show how the compasses would point. (5)
N
2.
S
Match each definition with the letter of the term it best describes. A letter may used more than once,
or not at all. (3)
a. diamagnetic
b. ferromagnetic
c. paramagnetic
1. oxygen, aluminum
2. material that magnetizes slightly when placed in the magnetic field of a coil
3. copper, silver
4. material that can be magnetized
5. material that causes a decrease in the magnetic field of a coil
6. nickel
2.
Sketch a small piece of unmagnetized iron that contains 6 domains. (2)
3.
Sketch the magnetic field around the current carrying wire shown below. (3)
X
4.
Label the poles of the solenoid below. (1)
5.
How could the magnetic field strength of a solenoid be increased? (3)
6.
i) What force will each wire experience in the diagrams below (label the diagram). (2)
ii) For one of the diagrams show how the magnetic fields produce the force you stated in i). (2)
a)
b)
S
S
N
e-
e-
N
7.
Which way must the current flow in each loop in the motor below for a counterclockwise
rotation. (2)
8. Indicate the electric current flow in the diagrams below and the magnetization of the solenoid.
State for each diagram if attraction or repulsion is making the solenoid turn. (4)
8.
A bar magnet is drawn AWAY from a solenoid as shown. Sketch and label the items listed
below clearly (in the suggested order).
[3 points]
a) magnetic poles of the solenoid
b) direction of electric current
N
c) direction of electron flow
S
moving
1.
Which substance would not be attracted by a magnet?
a. copper b. iron c. nickel d. steel e. cobalt
2.
Which statement about the magnetic north pole of Earth is true?
a. Its location never changes.
b. It corresponds to the N-pole of a bar magnet.
c. It is at the same location as the geographic north pole of Earth.
d. It corresponds to the S-pole of a bar magnet.
e. both A and D
3.
What will most likely happen when a bar magnet made of iron is heated?
a. The magnet will be permanent.
b. The magnet will become weaker.
c. The magnet will become stronger.
d. The poles of the magnet will reverse.
e. The magnet will become ferromagnetic.
4.
A magnetic domain is best described as
a. the magnetic field around a magnet
b. an atom that acts as a tiny magnet
c. a group of atoms with their magnetic axes lined up in the same direction
d. a metal that can be magnetized by induction
e. the strength of a magnetic field
5.
An iron nail can be turned into a temporary magnet if it is held in a strong magnetic field. This
method of magnetization is called
a. induction
b. saturation
c. conduction
d. charging
e. convection
6.
A bar magnet may lose its magnetic ability. This process is called
a. induced magnetism
b. reverse magnetism
c. magnetic saturation
d. ferromagnetism
e. demagnetization
7.
What type of iron can be instantly demagnetized?
a) hard
b) demagnetizable
c) dynamic
d) easy e) soft
8.
What can iron be alloyed with so that it remains permanently magnetized?
a) Aluminum, Lithium
b) Copper, Silicon
c) Lithium, Copper
d) Aluminum, Silicon
e) Lithium, Silicon
9.
The magnetic field lines inside a coil
a. are straight
b. point in the same direction c. are equally spaced
d. all of the above
e. none of the above