Online Assessment
Instructions
1) Type in your first and last name in the
“Name” box in the top-left corner.
2) Next type in your teacher’s name in
the “ID” box.
3) Then type in your school’s full name in the
“Email” box.
4) Select the best answer for each question.
5) When you
are finished click the “Grade and Submit” button.
6) The grade will be emailed
to your teacher.
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1.
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NOTE: This assessment is only for Mr.
Elliott’s students.
---If you are not one of Mr. Elliott’s students then please go
back to the website and click on the link for other teachers. Thanks!
Examine the picture shown below. No electrical
current will be induced by the device shown in diagram one.What key component is missing from this diagram?
a. | a
magnet | b. | volume | c. | solenoid | d. | current |
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2.
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Most of the electricity generated for homes and
factories comes from electromagnetic induction.
Which object shown below must move through a coil of copper wire to produce an
electric current in the wire?
a. | steel
rod | b. | battery | c. | litmus paper | d. | magnet |
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3.
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A student created a
simple electrical generator as shown below. He wanted to increase the amount of electrical current
from this generator.
Simple Electrical
Generator | | |
What is one modification he could do to make this
happen?
a. | Add and iron
core | c. | Add more coils of
wire | b. | Increase the amount of current | d. | Move the magnet more slowly |
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4.
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Rotational
Electrical Generator | | |
Your science teacher demonstrated a rotational electrical generator in class.
(see image above).
What are the three main components in a generator such as
this? a. | Magnet, solenoid, and an
electrical load. | b. | A light bulb, an iron core, and a battery. | c. | A wire with plastic or rubber
insulation | d. | Metal wires, a magnet, and an on-off
switch. |
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5.
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Rotational
Electrical Generator | | |
A
student in science class created a rotational electrical generator (see image above). He wanted to
increase the electrical current flowing from this device.
What is one action that he could do to make
this happen? a. | Remove the
magnet | c. | Install a higher watt light
bulb | b. | Rotate the coil more quickly | d. | Add an iron core |
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6.
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All magnets have invisible magnetic fields. When a
magnet is moved through a coil of wire, the magnetic field pushes electrons from atom to atom in the
wire creating electricity.
Which one of the images below shows electrical current being
induced?
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7.
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Attached to most car and truck engines are
generators called alternators that produce electrical current through the electromagnetic induction
process.
Which object listed below must be moved through or
around a solenoid in order to generate electricity in a car to make the headlines shine at
night?
a. | iron
core | b. | transformer | c. | a magnet | d. | coil of wire |
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8.
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In
a generator using a bar magnet, the solenoid remains stationary while the bar magnet moves (see
diagram A below).
Diagram A
Bar Magnet Generator | Diagram B
Rotational Generator | | | | |
Contrast the two types of generators shown in the
diagrams above in order to determine how a rotational generator is different from bar magnet
generator. a. | Bar magnet generators always
use fewer coils of wire in the solenoid. | b. | In rotational generators, the magnet is stationary while the coil moves.
| c. | It is not necessary to use a
magnet in rotational generators. | d. | Bar magnet generators always cost more to build
than rotational generators. |
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9.
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A student attaches a
meter to a wire coil. Next, the student moves a magnet back and forth through the coil, as shown in
the picture below. As the magnet
moves back and forth, the meter indicates...?
a. | temperature. | b. | current | c. | conductivity. | d. | volume. |
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10.
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To induce electrical current requires more than
just a magnet and a solenoid. Either the solenoid or the magnet must move through or around the other
item.
Select the choice below that shows electricity being induced.
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