Two wires both carry the same current I. The moving charged particles in both wires are electrons, but the con?
Two wires both carry the same current I. The moving charged
particles in both wires are electrons, but the concentration of
moving electrons in wire #1 is double the concentration of moving
electrons in wire #2.
nder what circumstances will the drift speed of electrons be the
same in both wires?
if the diameter of wire #2 is 4 times the diameter of wire #1
if the diameter of wire #2 is \sqrt 2 times the diameter of wire
#1
if the diameter of wire #2 is 1/\sqrt 2 the diameter of wire
#1
if the diameter of wire #2 is 2 times the diameter of wire #1
if the diameter of wire #2 is 1/2 the diameter of wire #1
if the diameter of wire #2 is 1/4 the diameter of wire #1
for wire1, inital DRIFT velocity is Vd = i/2neA
for wire 2, Vd = i/neA
here we must get Vd to be same for certain conditions
i,e i1/(2neA) = i2/(neA)
here i1=,i2
so 1/2A1 = 1/A2
A2 = 2A1
but A = pid^2/4
pid1^2/4 = 2* Pi d2^2/4
d2^2 = 2* d1^2
so d2 = sqrt2 times of d1
so
if the diameter of wire #2 is \sqrt 2 times the diameter of wire #1
is the answert
initial drift velocity Vd =i/2neA
so to get this we hav eto see the folloeing codtion to be
fullfilled
if the diameter of wire #2 is \sqrt 2 times the diameter of wire
#1
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