If a current of 0.5 A flows through a metallic wire for 2 h

cbse
electrochemistry

#1

If a current of 0.5 A flows through a metallic wire for 2 h, then how many electrons would flow through the wire?


#2

Here, current, i = 0.5 A, time, t = 2 h
Quantity of charge (Q) passed = Current (i) X Time (t)
= (0.5A)x(2x 60x60s)
= 3600 A s = 3600 C
Again, Q=${{ne}^{-}}$
where, n = number of electrons,
${{e}^{-}}$= charge on electron

n = Q/${{e}^{-}}$ = 3600C/1.6 x ${{10}^{-19}}$C

= 2250 x${{10}^{19}}$
Thus, number of electrons = 2.250 X${{10}^{22}}$