Examples of ampere in the following topics:
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- The force between current-carrying wires is used as part of the operational definition of the ampere.
- For parallel wires placed one meter away from one another, each carrying one ampere, the force per meter is:
- Incidentally, this value is the basis of the operational definition of the ampere.
- This means that one ampere of current through two infinitely long parallel conductors (separated by one meter in empty space and free of any other magnetic fields) causes a force of 2×10-7 N/m on each conductor.
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- where I is the current through the conductor in amperes, V is the potential difference measured across the conductor in volts, and R is the resistance of the conductor in ohms (Ω).
- To solve this problem, we would just substitute the given values into Ohm's law: I = 1.5V/5Ω; I = 0.3 amperes.
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- From the perspective of the voltage source and circuit outside the electrodes, the flow of electrons is generally described in terms of electrical current using the SI units of coulombs and amperes.
- current (in amperes) is the rate of charge transport: 1 amp = 1 $\frac {Coulombs}{second}$.
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- The ampere (A) is a measure of the amount of electric charge passing a point in an electric circuit per unit time. 6.241×1018 electrons, or one coulomb, per second constitutes one ampere.
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- The SI unit for current is the ampere (A), named for the French physicist André-Marie Ampère (1775–1836).
- Since I=ΔQ/Δt, we see that an ampere is one coulomb per second:
- An ampere is the flow of one coulomb through an area in one second.
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- This law is founded on the conservation of charge (measured in coulombs), which is the product of current (amperes) and time (seconds).
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- Capacitors are limited in their ability to prevent charge flow from one conductive surface to the other; their ability to hold charge is measured in Farads (F), which are defined as 1 ampere-second per volt, one joule per square volt and one Coulomb per volt, among other ways.
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- Substituting values of resistance and emf from the figure diagram and canceling the ampere unit gives:
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- where F is the force (in newtons, N), I is the current in the wire (in amperes, A), L is the length of the wire that is in the magnetic field (in m), and B is the magnetic field strength (in teslas, T).
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- The electric power in watts produced by an electric current I consisting of a charge of Q coulombs every t seconds passing through an electric potential (voltage) difference of V is $P = \frac{QV}{t} = IV$, where Q is electric charge in coulombs, t is time in seconds, I is electric current in amperes, and V is electric potential or voltage in volts.