To determine the resistance ( R ) of a wire, a circuit is designed below. The V − I characteristic curve for this circuit is plotted for the voltmeter and the ammeter readings as shown in figure. The

Question

To determine the resistance ( R ) of a wire, a circuit is designed below. The V − I characteristic curve for this circuit is plotted for the voltmeter and the ammeter readings as shown in figure. The value of R is ______ Ω .

TestHub · Accepted Answer

​ Req = 1 0 4 + R 1 0 4 R ​ E = 4 V , I = 2 m A I = R e q E ​ ⇒ 2 × 1 0 − 3 = 1 0 4 R 4 ( 1 0 4 + R ) ​ ⇒ 20 R = 40000 + 4 R ​ ​ 16 R = 40000 R = 2500Ω ​

Physics - Current Electricity Question with Solution | TestHub

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