Current Electricity and Electrical InstrumentHard

Question

A wire has a non-uniform cross-section as shown in figure. A steady current flows through it. The drift speed of electron at points P and Q is vP and vQ

Options

A.vP = vQ

B.vP < vQ

C.vP > vQ

D.data insufficient

Solution

vd = As A ↑ so vd ↓ ⇒ vP > vQ

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