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| What is the equation that relates current, charge, and time? |
I = ΔQ/Δt |
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noblejas Thu, 10 Apr 2008 17:05:10 GMT |
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| What is the equation to calculate resistance? |
R = ρl/A |
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noblejas Thu, 10 Apr 2008 15:25:47 GMT |
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| What are the units for resistance? |
ohms (Ω) |
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noblejas Thu, 10 Apr 2008 15:25:47 GMT |
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| What is ac? What devices use ac? |
alternating current- current that moves back and forth.
Devices that are plugged into a socket. |
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noblejas Wed, 09 Apr 2008 04:44:13 GMT |
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| What is dc? What devices use dc? |
direct current- current that moves in only one direction.
Devices that use batteries. |
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noblejas Wed, 09 Apr 2008 04:44:13 GMT |
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| What is the equation to calculate power in a circuit? |
P=IV |
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noblejas Wed, 09 Apr 2008 04:44:13 GMT |
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| What does power represent in the traffic analogy? |
packages delivered per unit time |
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noblejas Thu, 10 Apr 2008 16:43:30 GMT |
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| What is the unit for power? |
watt (W) |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What is power? |
Energy used per unit time |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What factors affect resistance? |
type of material, length, cross-sectional area, and temperature |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What is the equation that relates current, voltage, and resistance? |
I=V/R |
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noblejas Thu, 10 Apr 2008 16:43:14 GMT |
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| What does voltage represent in the traffic analogy? |
steepness of the hill |
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noblejas Thu, 10 Apr 2008 16:42:59 GMT |
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| What is the unit for potential difference/voltage? |
volts (V) |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What does current represent in the traffic analogy? |
amount of truck passing per unit time (traffic flow) |
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noblejas Thu, 10 Apr 2008 16:42:42 GMT |
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| What is the unit for current? |
amperes (A) |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What is current? |
amount of charge passing per unit time |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What does it represent in the traffic analogy? |
trucks |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What is the unit for charge? |
coulombs (C) |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What materials are usually conductors? |
metals |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What is a semiconductor? |
An object that can act like an conductor or insulator |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What is a conductor? |
An object where charges are free to move |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What is an insulator? |
An object where charges are not free to move |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What is polarization? |
When one side of an insulator is more positive and the other side negative resulting in a neutral object being attracted to a charged object. |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What are the ways that an insulator can be charged? |
friction and contact |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What are the ways that a conductor can be charged? |
contact and induction |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| What are the 3 ways to charge objects? |
1. friction
2. contact
3. induction |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| How does a positive and negative charge interact? |
attract |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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| How do two positive charges or two negative charges interact? |
repel |
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noblejas Wed, 09 Apr 2008 04:44:12 GMT |
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