Two ends of a metallic wire of length l and radius r are connected to the terminals of a battery of emf E and the drift velocity of free electrons is found to be ‘V’ . What will be the drift velocity of free electrons when the ends of a metallic wire made of same material having length $$2l$$ and radius $$2r$$ are connected to the terminals of a battery of emf $$2E$$?

Question

Infinity Learn · Accepted Answer

$$Vd=jne=iAne=ERAne=E$$ρ.$$lAAne=E$$ρnel∴$$V1V=E1Ell1=212=1$$⇒$$V1=V$$

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