Concept Of Electric Current explained in a simple manner with an actual JEE solved question. JEE Physics XII Current Electricity
CONCEPT OF ELECTRIC CURRENT
We have learnt that charge moves from higher to lower potential. This motion of charge is called current.
Current is defined as rate of flow of charge. Unit Cs—–1 or A(Ampere)
Hence I=dQ/dt=n/t e=e.dn/dt
The convectional direction of current is taken to be the direction of flow of positive charge , I .e., filed and current i is opposite to the direction of flow of negative charge
The net charge in a current carrying conductor is zero
For a given conductor current does not change with change in cross sectional area
i_1=i_2=i_3=i
The charged particles whose flow in different direction constitutes the electric current are called current carriers.
