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If voltage, (V) equals Joules per Coulombs (V = J/C) and Amperes (I) equals charge (coulombs) per second (A = Q/t), then we can define electrical power (P) as being the totality of these two quantities. This is because electrical power can also equal voltage times amperes, that is: P = V*I.
The coulomb (symbol: C) is the unit of electric charge in the International System of Units (SI). [1] [2] It is equal to the electric charge delivered by a 1 ampere current in 1 second and is defined in terms of the elementary charge e, at about 6.241 509 × 10 18 e. [2] [1]
More than 100 years before Thomson and Rutherford discovered the fundamental particles that carry positive and negative electric charges, the French scientist Charles-Augustin de Coulomb mathematically described the force between charged objects.
A coulomb of charge is just a very large group of electrons. The relationship between current I and quantity of charge Q. An electric current is a flow of charged particles. The size of...
The SI unit for electric charge is the coulomb (abbreviated as “C”), which is named after the French physicist Charles Augustin de Coulomb, who studied the force between charged objects. The proton carries + 1.602 × 10 −19 C. + 1.602 × 10 −19 C. and the electron carries −1.602 × 10 −19 C, −1.602 × 10 −19 C, .
\(Q\) is the the charge in coulombs, \(t\) is the time in seconds. A common analogy for electric current is the flow of water through a pipe or river. Just as we can imagine water flow as “gallons or liters per minute”, we imagine electric current as “coulombs per second”.
A coulomb is defined as the amount of electric charge that passes through a conductor when a current of one ampere flows for one second. This relationship highlights how current, measured in amperes, directly relates to the movement of charge over time.
