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he thangle?[Ans 8 23. A parallel combination of three resistors takes a currentof 7.5 ampere from a 30 V battery. If two of the resistorshave a resistance of 10 ohm and 12 ohm, find theAns 15 ohmresistance of the third resistor. |
Answer» The resistance of the group of 3 resistors is equal to R = 30 V / 7.5 A =4 ohm. Let R3 be the resistance of the third resistor, then 1/R =1/10 + 1/12 + 1/R3 so, 1/4 = 1/10 + 1/12 + 1/R3 1/R3 = 1/4- 1/10 - 1/12= 15/60 - 6/60 - 5/60= 4/60 hence R3 = 60/4 = 15 ohm thank |
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