Download Shock Value Camas B Invite 2010

Camas B Invitational
Shock Value
12/11/10
School/Team: ______________________________________ ID: B - ____
Names: _____________________________________________
Instructions:
 Answer all questions on this answer sheet.
 Sheets may be double sided, check both sides!
 If you separate the sheets of the test be sure to label each sheet with
school/team and ID in case they get mixed up during scoring.
 Unless otherwise noted all questions are worth One point.
 You will be moving through stations, move promptly when instructed so all
teams have an equal amount of time (3 minutes).
 Leave the station as you found it. Failure to do so could result in a reduction in
score.
 If you finish with the station before the allotted time is up, you can continue
working on the rest of the test.
 Tie breakers: 1st Station 1, 2nd Station 4, 3rd Station 5
For Scoring only
Page 2
__________/6
Page 3
__________/8
Page 4
__________/8
Page 5
__________/10
Station 1
__________/20
Station 2
__________/10
Station 3
__________/10
Station 4
__________/15
Station 5
__________/10
Total
__________/97
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Camas B Invitational
Shock Value
12/11/10
Multiple Choice
Circle the letter of the choice that best completes the statement or answers the question.
1. Where is the magnitude of the magnetic field around a permanent magnet greatest?
a. close to the poles
b. far from the poles
c. The magnitude is equal at all points on the field.
d. The magnitude depends on the material of the magnet.
2.Which compass needle orientation in the figure above might correctly describe the magnet’s field at that point?
a. a
c. c
b. b
d. d
3. Which describes magnetic declination?
a. the angle between Earth’s magnetic field and Earth’s surface
b. Earth’s magnetic field strength at the equator
c. the tendency for Earth’s field to reverse itself
d. the angle between directions to true north and magnetic
4. A current in a solenoid with N turns creates a magnetic field inside the solenoid. The magnetic field strength is
directly proportional to the
a. number of turns only.
b. strength of the current only.
c. number of turns in the loop and the strength of the current.
d. size of the solenoid.
5.In a permanent magnet,
a. domain alignment persists after the external magnetic field is removed.
b. domain alignment becomes random after the external magnetic field is removed.
c. domains are always randomly oriented.
d. the magnetic fields of the domains cancel each other.
6. In soft magnetic materials such as iron, what happens when an external magnetic field is removed?
a. The domain alignment persists.
b. The orientation of domains fluctuates.
c. The material becomes a hard magnetic material.
d. The orientation of domains changes, and the material returns to an unmagnetized state.
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Camas B Invitational
7.Resistance is measured in a unit called the ____.
a. ampere
b. coulomb
Shock Value
c. ohm
d. volt
8.The statement that current is equal to the voltage difference divided by the resistance is known as ____.
a. Einstein's equation
c. Newton's law
b. Faraday's law
d. Ohm's law
9.A path that allows only one route for an electric current is called a ____.
a. parallel circuit
c. series circuit
b. parallel current
d. series current
10.A static discharge differs from an electric current in that a static discharge ____.
a. involves the movement of ions as well as electrons
b. is a flow of electrons
c. lasts for only a fraction of a second
d. results because a force is exerted on the electrons
11. Which of the following is a device designed to open an overloaded circuit and prevent overheating?
a. circuit breaker
c. resistor
b. magnet
d. transformer
12. The function of an electric motor is to change ____.
a. chemical energy to electrical energy
b. electrical energy to chemical energy
c. electrical energy to mechanical energy
d. mechanical energy to electrical energy
13.A dry-cell battery produces ____.
a. an alternating current
b. a direct current
c. the same current that a generator produces
d. both direct and alternating current
14. The magnetic force of a magnet is ____.
a. the same at all parts of the magnet
b. strongest at the center
c. strongest at the poles
d. weakest at the poles
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12/11/10
Camas B Invitational
Shock Value
12/11/10
Short Answer
15. A bar magnet is suspended and allowed to rotate freely. If the magnetic field of Earth is considered to be
equivalent to that of a large bar magnet, which pole of the suspended magnet would point toward the magnetic
north pole of Earth?
16. (2 points) If the head of an iron nail touches a magnet, the nail will become a magnet by induction. If the nail
touches the north pole of the magnet, what kind of pole is at the point of the nail? Explain.
17. (2 points) How can the magnetic field around a permanent magnet be determined?
18. The magnetic field of a bar magnet is shown in the figure above. Is the magnet’s north pole at A or B?
19. Which magnetic pole is at the geographic North Pole of Earth?
20. Will the magnets in the figure above attract or repel each other?
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Camas B Invitational
Shock Value
12/11/10
21. (2 points) Which bulbs will have a current in the schematic diagram above?
22. In the schematic diagram above, will there be a current?
23. Will the magnets in the figure above attract or repel each other?
24. (2 points) Describe how you could quickly determine whether a string of lights is wired in series or in parallel.
25. (2 points) List two materials that are conductors and two materials that are insulators.
26. (2 points) Explain how an electromagnet works.
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Camas B Invitational
Shock Value
Station 1 (20 points)
Record Data Table here:
Station 2 (10 points)
Draw the electronic symbols:
a)
b)
c)
d)
e)
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12/11/10
Camas B Invitational
Shock Value
Station 3 (10 points)
Good Batteries:
Bad Batteries:
Station 4 (15 points)
a) (5 points) Describe in words:
b) (2 points) Lights on:
c) (5 points) Draw the circuit:
d) (3 points) Lights on:
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12/11/10
Camas B Invitational
Shock Value
12/11/10
Station 5
Using the compasses provided map out where the magnets are and indicate N/S poles. (Yes you can
lay this sheet on the board!)
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