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A 50-ohm resistor is in parallel with 100-ohm resistor. Current in 50-ohm resistor is 7.2 A. How will you add a third resistor and what will be its value of the line-current is to be its value if the line-current is to be 12.1 amp ?Read more on Sarthaks.com - https://www.sarthaks.com/457612/a-50-ohm-resistor-is-in-parallel-with-100-ohm-resistor-current-in-50-ohm-resistor-is-7-2-a |
| Answer» Source voltage = 50 × 7.2 = 360 V, Current through 100–ohm resistor = 3.6A Total current through these two resistors in parallel = 10.8 A For the total line current to be 12.1 A, third resistor must be connected in parallel, as the third branch, for carrying (12.1 − 10.8) = 1.3 A. If R is this resistor R = 360/1.3 = 277 ohms | |