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- ...rter lifespan compared to other battery types. A more advanced lithium-ion battery design is the [[lithium polymer cell]]. ...chargeable cells were created in early 1970s. The rechargeable lithium-ion battery required nearly 20 years of development before it was safe enough to be use ...18 KB (2,753 words) - 14:33, 10 September 2006
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- '''1. A 12 kΩ resistor and a 20 kΩ resistor are connected to a 9V battery. A voltmeter is connected across the 12Ω resistor. What is the reading on t ...he wiper is connected to a voltmeter, and the circuit is powered by a 120V power source with negligible internal resistance. What is the reading on the volt ...2 KB (267 words) - 16:21, 8 January 2008
- = Calculating electric power = We've seen the formula for determining the power in an electric circuit: by multiplying the voltage in "volts" by the curren ...3 KB (565 words) - 08:49, 22 February 2007
- ...n EMF between either end of the source. For example, the negative end of a battery may exert 9V of EMF, whereas the positive end exerts no EMF. As a result, t ...ach coulomb of charge carries less energy, so the voltage (relative to the power source) decreases. The difference between the voltage at two points in a ci ...2 KB (416 words) - 16:12, 2 January 2008
- ...meaning that you can take the total potential difference as the EMF of the power source. 1. A 12 kΩ resistor and a 20 kΩ resistor are connected to a 9V battery. A voltmeter is connected across the 12Ω resistor. What is the reading on t ...3 KB (437 words) - 15:56, 8 January 2008
- ...ed attaching the conductor to some source (generator), like a battery or a power supply. ...850 bytes (130 words) - 23:20, 23 October 2006
- So far, we've been analyzing single-battery, single-resistor circuits with no regard for the connecting wires between t ...ions. In real life, metal wires actually ''do'' have resistance (and so do power sources!), but those resistances are ...7 KB (1,097 words) - 05:43, 23 February 2007
- == Power-Save Super Loop == ...ctrical power, which can be especially good if the system is running off a battery. ...3 KB (528 words) - 17:12, 12 June 2007
- ...ou would say that the current is flowing from the positive terminal of the battery to the negative one. This is called '''conventional current'''. The electro The voltage that you get from the power supply can be simply described as the "push" given to the electrons to go a ...8 KB (1,402 words) - 18:52, 24 May 2007
- Let's start with a series circuit consisting of three resistors and a single battery: From the way that the 9 volt battery is arranged, we can tell that the electrons in this circuit will flow in a ...8 KB (1,406 words) - 08:31, 28 June 2006
- ...rter lifespan compared to other battery types. A more advanced lithium-ion battery design is the [[lithium polymer cell]]. ...chargeable cells were created in early 1970s. The rechargeable lithium-ion battery required nearly 20 years of development before it was safe enough to be use ...18 KB (2,753 words) - 14:33, 10 September 2006
- ...battery, then there must be a negative potential on the other side of the battery. ...connected to a resistor: there's 9V across the resistor, and 9V across the battery; the directions work out so that they subtract: 9V − 9V = 0.) ...10 KB (1,626 words) - 20:48, 10 September 2007
- ...stances with less loss than a DC circuit providing an equivalent amount of power. == 3. Connect a buzzer, bell, or light with a battery using a switch in line. == ...10 KB (1,731 words) - 20:16, 4 October 2007
- ***High power handling capability |style="background:#AAAAAA"|You are wiring a motor to a 12 V battery. The only wire you have is rated for 10 A. If the motor has a resistance ...8 KB (1,348 words) - 05:10, 11 March 2007
- ...used to differentiate a power source ("independant source") from an active power control device, or amplifier ("dependant source"). It is probably more usef ...f current that the circuit draws from the battery determines how long the "battery life" is. ...10 KB (1,590 words) - 22:33, 10 January 2008
- F.3.8 Conventional power takes a lot more fuel, but is tried and true, and the fuel is easier to get F.3.9 Safety is a big issue in nuclear power. If the reactor temperature rises too high, a meltdown could occur. When th ...7 KB (1,102 words) - 18:33, 27 February 2008
- ...reases as the fictional battery's voltage increases. Finally the fictional battery's voltage equals the applied voltage, so that no current can flow into, nor ...the discharge current also decreases. Finally the voltage of the fictional battery is zero, and therefore the discharge current also is then zero. ...19 KB (3,033 words) - 23:12, 6 November 2007
- DC is the kind of electric power made by a battery (with ...not the only "kind" of electric power in use. Certain sources of electric power (most ...14 KB (2,352 words) - 21:33, 6 April 2007
- ==[[Electronics/Voltage, Current, and Power|Voltage, Current, and Power]]== '''Power''' ...22 KB (3,649 words) - 16:58, 24 February 2008
- ===Power in a Resistor=== The power, ''P'', dissipated in a resistor is given by ...14 KB (2,332 words) - 14:35, 15 February 2008
- ...her, and it is the utilization of such an attractive force that allows the battery to do work. ...r centimetre. A person could put their shoe across the terminals of a car battery and it would look like an insulator. But putting a shoe across a ten kilov ...18 KB (2,896 words) - 16:41, 24 February 2008