A conducting wire of length l , area of crosssection A and electric resistivity ρ is connected between the terminals of a battery. A potential difference V is developed between its ends, causing an el

Question

A conducting wire of length l , area of crosssection A and electric resistivity ρ is connected between the terminals of a battery. A potential difference V is developed between its ends, causing an electric current. If the length of the wire of the same material is doubled and the area of cross-section is halved, the resultant current would be___

TestHub · Accepted Answer

As per the question Resistance = ρ 2 l A / 2 = 4 ρ l A ⇒ Current = V R = V A 4 ρ l

Physics - Current Electricity Question with Solution | TestHub

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