SPI 0807.12.2
(Electromagnets)
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1.
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The parts of an electromagnet are shown
below.
 The strength of the magnet will be increased by...?a. | using more nails. | b. | making more loops with the
wire. | c. | placing the battery closer to the wire. |
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2.
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A
portion of an electromagnet is shown in the diagram below.
The electromagnet will be completed by adding...? a. | a
switch. | b. | a
battery. | c. | metal
clips. |
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3.
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The construction of an electromagnet would be best
completed by introducing a current into loops of wire wrapped around...?
a. | an iron nail. | b. | a glass square. | c. | a plastic
rod. |
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4.
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A student builds the electromagnet shown in the
diagram below
How can the student
increase the strength of the magnetic field around the electromagnet? a. | Use a wire with a smaller
diameter. | b. | Increase the number of loops in the coil. | c. | Move the battery closer to the
nail. |
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5.
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A simple electromagnet is displayed
below.
One way to increase the strength of this electromagnet is to add more coils to
the solenoid.
What is another way to increase the strength?a. | using a more powerful battery | b. | using a thicker wire. | c. | using more
nails. |
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6.
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Diagram A | Diagram B | | | Device 01 | Device 02 | | |
(Two-Part
Question) | | (1) Contrast the two diagrams shown above. | | (2) What is wrong
with the device in diagram A? | |
a. | (1) Diagram A is an electromagnet, and Diagram B is a
generator.
(2) The wires are not connected to the battery for device 01, so it will not work.
| b. | (1) Diagram B is an electromagnet, and Diagram A
is an electric motor.
(2) In Diagram B the handle is not being turned fast enough to power the
light bulb.. | c. | (1) Diagram A is a
permanent magnet, and Diagram B is an electromagnet.
(2) There is nothing wrong with device
01. |
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7.
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A diagram is shown below.
A student makes an electromagnet as shown
above and finds that it is only strong enough to pick up one paper clip. What modification will she
need to do in order to make it pick up three paper clips?a. | use paper clips made of
aluminum | b. | use staples instead of paper
clips | c. | wrap more coils around the
nail |
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8.
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Which statement
best compares a
permanent magnet and an electromagnet?
a. | A permanent magnet has a
north pole and a south pole, but an electromagnet only has a south
pole. | b. | A permanent magnet has a fixed magnetic field strength but the magnetic field
strength of an electromagnet can be changed. | c. | The magnetic field lines from a permanent magnet
emerge from the north pole, but they emerge from the south pole of the
electromagnet. |
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9.
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A student made an electromagnet by wrapping copper wire around an iron nail.
The student then connected each end of the electromagnet to the opposite terminals of a battery. The
electromagnet will best
function as a magnet as long as...? a. | electric current flows
through the wire. | b. | electrical energy is transformed into potential
energy. | c. | electric current flows through the
nail. |
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10.
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A diagram is shown below.
This diagram displays an electromagnet. What
are the three major components of an electromagnet?a. | solenoid, iron core, source of
electricity | b. | bar magnet,
galvanometer, iron core | c. | coil of wire,
solenoid, source of electricity |
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