1. T/F: The relationship between the resistance, length, and
area of a resistor is always linear.
Answer:
False. Not linear at some extremes.
2. Given a wire with a resistivity of 1.68 x
10-8Wm, length of 30cm, and
a diameter of 2mm. Use R = rL/A to calculate its resistance:
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Answer:
R = .002 Ohms
3. Please describe how the right hand rule works for the following
vector: F = q(v x B)
(feel free to use any diagrams, etc. to clarify your answer):
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Answer:
cross product means resultant vector is perpendicular to both; right
hand rule says
4. Suppose there is a magnetic field directed into the page and
there's a wire embedded in the paper horizontally. If the wire is
suddenly made to carry a current from left to right, the wire:
Answer:
C -- moves up.
moves left.
moves right.
moves up.
moves down.
5. Name at least one kind of transducer employed by Calvin in the
following cartoon:
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Answer:
Speaker, microphone, keypad.
