Answer to Question #23094 in Electric Circuits for jean
The actual current is thus I = V / R = 3 V / 6 ohms = 0.5 A.
If taking into account only the resistance of the rheostat, calculated current
would be Ir = V / Rr = 3 V / 5 ohms = 0.6 A.
The percentage error with respect to the true value can be estimated as
PE = 100% * abs(I - Ir) / I = 100% * 0.1 A / 0.5 A = 0.2 * 100% = 20%.
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