What is meant by electric current? Name and define its SI unit. In a conductor electrons are flowing from B to A. What is the direction of conventional current? Give justification for your answer.
A steady current of 1 ampere flows through a conductor. Calculate the number of electrons that flows through any section of the conductor in 1 second. (Charge on electron 1.6 X 10-19 coulomb).
Answers
Answer:
Explanation:
Electric current, any movement of electric charge carriers, such as subatomic charged particles (e.g., electrons having negative charge, protons having positive charge), ions (atoms that have lost or gained one or more electrons), or holes (electron deficiencies that may be thought of as positive particles).
The SI unit of electric current is the ampere, or amp, which is the flow of electric charge across a surface at the rate of one coulomb per second. The ampere (symbol: A) is an SI base unit Electric current is measured using a device called an ammeter.
The direction of flow of electrons is gn to be from A to B, ie, electrons start from A and end at B.
The direction of conventional current is opposite to the flow of electrons.
Therefore, the direction of flow of convention current is from B to A.
current (i) = (number (n)× charge on electron (e))÷time
therefore i = ne ÷ t
by putting the value
1 = n × 1.6×10^-19 ÷1
n = 1 ÷ 1.6× 10^-19
n = 0.625×10^19