What is the SI derived unit of electrical current?
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What is the SI derived unit of electrical current?
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Answer:
1. The SI derived unit of electric current is 'Ampere'.
2. If a net charge Q, flows across any cross-section of the conductor in time t, then the current I, through the cross section is:
I=Q/t
Ampere=Coulomb/second
1 ampere=1 coulomb/1 sec
3. Current can be defined as the flow of charge across a surface at the rate of 1 coulomb per second.
4. Small quantities of current are expressed in milliamperes or in microamperes.
5. An instrument called ammeter measures current in a circuit.
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