The correct option is C vP>vQ
Explanation
→ The current flowing is same at every cross section throughout the conductor. If any charge enters through a cross section in any part of conductor an equal amount of charge must leave out through another cross section . This is because there is no accumulation or production of charge in any part of conductor , they only continuously flow through every cross section.
→ We know, current I=neAvd
vd=IneA
n→ charge Carrier density ( free
electron density )
A→ Area of cross-section
vd→ Drift velocity
Here n,e & I are constant.
So, vd∝1A
Since, AQ>AP
⇒1AQ<1AP
Or (vd)Q<(vd)p⇒(v)Q<(v)p
Hence, option (c) is correct.