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Topic: Potential difference

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	Encyclopedia: Potential difference
		Potential difference is a quantity in physics related to the amount of energy that would be required to move an object from one place to another against various types of force.
		In mechanics, the gravitational potential difference between two points on Earth is related to the energy that would be required to move a unit mass from one point to the other against the Earth's gravitational field.
		In electrical engineering, the electrical potential difference ('voltage') between two points is the energy that would be required to move a unit of electrical charge from one point to the other against the electrostatic field that is present.
	www.nationmaster.com /encyclopedia/Potential-difference (1058 words)

	Encyclopedia topic: Potential difference (Site not responding. Last check: 2007-10-21)
		A potential difference is generated between the ends of an electric (A car that is powered by electricity) al conductor (The person who leads a musical group) that moves perpendicular to a magnetic field (The lines of force surrounding a permanent magnet or a moving charged particle).
		Instruments for measuring potential differences include the voltmeter (Meter that measures the potential difference between two points), the potentiometer (A resistor with three terminals, the third being an adjustable center terminal; used to adjust voltages in radios and TV sets) (measurement device), and the oscilloscope (Electronic equipment that provides visual images of varying electrical quantities).
		The cathode-ray oscilloscope works by amplifying the potential difference and using it to deflect an electron (An elementary particle with negative charge) beam from a straight path, so that the deflection of the beam is proportional (One of the quantities in a mathematical proportion) to the potential difference.
	www.absoluteastronomy.com /encyclopedia/p/po/potential_difference.htm (1118 words)

	Read about Potential difference at WorldVillage Encyclopedia. Research Potential difference and learn about Potential ... (Site not responding. Last check: 2007-10-21)
		In the physical sciences, potential difference is the difference in
		A potential difference is generated between the ends of an electrical conductor that moves perpendicular to a
		Ohm's Law, is proportional to the potential difference across it.
	encyclopedia.worldvillage.com /s/b/Voltage (840 words)

	Potential Difference (from electricity) -- Britannica Student Encyclopedia
		A discrete variable is one that is defined or of interest only for values that differ by some finite amount, usually a constant and often 1; for example, the discrete variable x may have the values x0 = a, x1 = a + 1, x2 = a + 2,.
		In the neuron an action potential produces the nerve impulse, and in the muscle cell it produces the contraction required for all movement.
		Potential energy is a property of a system and not of an...
	www.britannica.com /ebi/article-200051?ct= (905 words)

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