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The value of the resistance R in the circuit shown in the given figure is varied in such a manner that the power dissipated in the 3 ohm resistor is maximum. Under this condition, the value of R will be _____ Ω .
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- 0
- 6
- 21
- None of the above
Correct Option: B
For maximum power transfer,
| 3 = | ||
| 6 + R |
⇒ R = 6 Ω
