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Grade 12th passElectric Current

An electric current of 5 Amp is divided into three branches, the length of the resistance wires in three branches being proportional to 1 2 and 3. Find the current in each branch

Profile image of Abishek
7 Years agoGrade 12th pass
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2 Answers

Profile image of Arun
7 Years ago
R is directly proportional to the length of the conductor. So R¹:R²:R³ = 1:2:3Let R¹ be = xSo, R² = 2xAnd, R³ = 3xNow, R(eq.) = (R¹R²R³)/(R¹R² + R²R³ + R³R¹) = 6x/11Now, I = V/R=> 5 = V/(6x/11) = 11x/6 * V=> V = 30x/11 Now I² = V/R = 30x/11 * 1/2x = 15/11So, the current flowing in the middle branch will be 15/11 A.
Profile image of Sanjana verma
4 Years ago
An electric current of 5 ampere is divided into three branches. The length of the wires in the three branches being proportional to 1:2:3. Find the current in each. The wires are of the same material and cross section