Voltage - The Electromotive Force That Moves Charges in An Electric Circuit
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Voltage - The Electromotive Force That Moves Charges in An Electric Circuit

136 Joules of work is expended in moving 8.5 x 1018 electrons from point x1 in a conductor to point x2 in the conductor. What is the potential difference (in Volts) between x1 and x2?

The string:
(a) S7P3A32 (Force - Push).
The math:
Pj Problem of Interest is of type force. Problems of voltage, energy, and work in an electric circuit are force problems.
1 Joule (J) of work is expended when 1 Coulomb (C) of charge is moved between two points at a potential difference of 1 Volt (V).
So, the relationship between work, charge and voltage is expressed as follows:
W = QV
Where W is work in Joules; Q is charge in Coulombs; and V is voltage in Volts.
So, 1 Volts = 1 Joule/1 Coulomb.
Charge of an electron = -1.602 x 10-19.
So, Total Charge = (1.602 x 10-19) x (8.5 x 1018)
Therefore, Volts (V) = 136 J/(1.602 x 10-19) x (8.5 x 1018) = 1360/13.6 = 100 V.

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