Verified Solution • 2025–26 Session moderate

QNEET-2016-Ph-1176: NEET 2016 Physics - Class 12 NEET-2016-Ph-1176 Solution: Which of the following combinations should be selected for…

Which of the following combinations should be selected for better tuning of an L-C-R circuit used for combination? R = 20Ω20\Omega L = 1.5 H C = 35μF35\mu F R = 25Ω25\Omega L = 2.5 H C = 45μF45\mu F R = 15Ω15\Omega L = 3.5 H C = 30μF30\mu F R = 25Ω25\Omega L = 1.5 H C = 45μF45\mu F

Multiple Choice Options

  • A R = 20 Ω\Omega � , L = 1.5 H, C = 35 μ\mu _ F
  • B R = 25 Ω\Omega � , L = 2.5 H, C = 45 μ\mu _ F
  • C R = 15 Ω\Omega � , L = 3.5 H, C = 30 μ\mu _ F
  • D R = 25 Ω\Omega � , L = 1.5 H, C = 45 μ\mu _ F

Step-by-Step Verified Solution

Quality factor of an L-C-R circuit is given by, Q = 1 R L C So, Q 1 = 1 20 1.5 35 _ 10 _ 6 = 10.35 Q 2 = 1 25 2.5 45 _ 10 _ 6 = 9.43 Q 3 = 1 15 3.5 30 _ 10 _ 6 = 22.77 Q 4 = 1 25 1.5 45 _ 10 _ 6 = 7.30 As Q 3 is maximum of Q 1 , Q 2 , Q 3 , and Q 4 . Hence, option (c) should be selected for better tuning of an L-C-R circuit.

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