The ampere is one of seven SI base units, and is defined in terms of the force it produces between two, parallel, current-carrying conductors. It is incorrect to say that an ampere is 'defined' as a coulomb per second, although it is certainly 'equivalent' to a coulomb per second.The coulomb is a SI derived unit, and is defined in terms of the ampere and the second. In fact, it is a special name given to an ampere second.
1 coulomb per second = 1 amp.Note "coulomb" is the NUMBER of electrons....... "amps" is a measure of flow.AnswerAn ampere (not 'amp') is not defined in terms of coulombs, but in terms of the force between two, parallel, current-carrying conductors due to the interaction of their magnetic fields. However, an ampere is equivalent to (but not defined as) a coulomb per second.
The SI unit of electric charge is called the coulomb. It is a derived unit, and is defined as the amount of charge moved by a steady state current of one ampere for one second. Alternatively, it is defined as the amount of charge across a capacitance of one farad charged to a potential of one volt. In terms of elementary charge, from nuclear physics, it is defined as the charge represented by about 6.24150965 x 1018 protons or electrons.
an ampere
Because you have to start somewhere - you can't derive ALL units. You have to have SOME fundamental units.For example, 1 ampere = 1 coulomb / second. That also means that 1 coulomb = 1 ampere x 1 second, or that 1 second = 1 coulomb / 1 ampere. In other words, you can derive any of the three units from the other two. In practice, for base units, units were chosen that can be measured with great precision.Another AnswerThe ampere is not a 'fundamental' unit; it is a base unit. The ampere was chosen as a base unit, because it relates electrical units to mechanical units, being defined, as it is, in terms of the force (which itself is defined in terms of base units) between current-carrying conductors.You might be getting confused because, quite wrongly, the ampere is often defined as a 'coulomb per second'. While it is certainly equivalent to a coulomb per second, it is not definedin this way.
1 Coulomb per second.
One coulomb of electric charge per second passing a fixed point in a conductoris the definition of a current of 1 Ampere through the conductor.CommentAn ampere is most definitely not defined as a 'coulomb per second'. It is defined in terms of the force between two, parallel, current carrying conductors.
The ampere is one of seven SI base units, and is defined in terms of the force it produces between two, parallel, current-carrying conductors. It is incorrect to say that an ampere is 'defined' as a coulomb per second, although it is certainly 'equivalent' to a coulomb per second.The coulomb is a SI derived unit, and is defined in terms of the ampere and the second. In fact, it is a special name given to an ampere second.
1 ampere = 1 coulomb / second. Actually, in the SI, it is defined the other way round; the ampere is the base unit, and the coulomb is defined as 1 ampere-second. However, it is easier to think of the ampere as 1 coulomb/second.
The ampere is defined in terms of the force between two, parallel, current-carrying conductors.A current of one ampere flowing for one second will transport a charge of one coulomb. So a coulomb is an ampere second. Transposing this confirms that an ampere is equivalent to (not 'defined' as) a coulomb per second.
Although an ampere is equivalent to a coulomb per second, the ampere isn't defined in terms of a coulomb and a secondIn fact, the ampere has never been defined as a 'coulomb per second'. Think about it! An ampere is an SI Base Unit whereas the coulomb is a Derived Unit. So the coulomb must be defined in terms of an ampere, not the other way around!In fact, it is the coulomb that is defined in terms of the ampere and the second.Until the adoption of the mksA (metre, kilogram, second, ampere) system, the ampere was defined in terms of the mass of silver deposited, by electrolysis, over a specified period. With the adoption of the mksA (and, subsequently, the SI system), the ampere has since been defined as follows:'the constant current that, if maintained in two straight parallel conductors of infinite length and negligible cross-sectional area and placed one metre apart in a vacuum, would produce between them a force equal to 2 × 10-7newtons per unit length'.
1 coulomb per second = 1 amp.Note "coulomb" is the NUMBER of electrons....... "amps" is a measure of flow.AnswerAn ampere (not 'amp') is not defined in terms of coulombs, but in terms of the force between two, parallel, current-carrying conductors due to the interaction of their magnetic fields. However, an ampere is equivalent to (but not defined as) a coulomb per second.
Since current in amperes is defined as one coulomb per second, then passing one coulomb through a conductor in one minute consitututes a current of one sixtieth of an ampere, or 16 2/3 milliamperes.
A coulomb is a unit of electrical charge. It is the charge that passes a point in an electrical circuit in one second when a current of 1 ampere is flowing through the point.
That is called an Ampere. By the way, in the SI the Ampere is defined as a base unit; the Coulomb is the derived unit.
The SI unit of electric charge is called the coulomb. It is a derived unit, and is defined as the amount of charge moved by a steady state current of one ampere for one second. Alternatively, it is defined as the amount of charge across a capacitance of one farad charged to a potential of one volt. In terms of elementary charge, from nuclear physics, it is defined as the charge represented by about 6.24150965 x 1018 protons or electrons.
A ampere is a measure of the flow rate of electricity a coulomb is an amount of electricity. So 1 ampere is a flow of electricity at the rate of 1 coulomb per second.AnswerStrictly speaking, as the ampere is an SI base unit whereas a coulomb is a derived unit, it is more accurate to say that 'a coulomb is an ampere second (A.s)'.With reference to the first answer, the ampere is the SI unit for electric current (not the 'flow rate of electricity', which is meaningless), and the coulomb is the SI unit for electric charge (not the 'amount of electricity'). 'Electricity' isn't a quantity, so it cannot be measured.