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7. A resistance of 30 ohm is connected across 240v supply. If a resistance R ohm is connected in parallel with 30ohm resistor across the same supply, the current drawn becomes triple of original one The unknown resistor R is
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Answer Posted / mahesh
24=240(30+r)/30r
then r= 15 ohms
| Is This Answer Correct ? | 48 Yes | 7 No |
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