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JIPMER 2012
Exam
JIPMER
Year
2012
Subject
Physics
Chapter
Alternating Current

JIPMER 2012 · Physics · Alternating Current

In an L-C-R circuit inductance is changed from L to L / 2 . To keep...

In an L−C−RL-C-R circuit inductance is changed from LL to L/2L / 2. To keep the same resonance frequency, CC should be changed to

Options

  1. A2C2 C
  2. BC2\frac{C}{2}
  3. C4C4 C
  4. DC4\frac{C}{4}

Correct answer

A. 2C2 C

Step-by-step solution

v=1LCv=\frac{1}{\sqrt{L C}} When LL is changed to L/2,CL / 2, C must be changed to 2 C to keep vv same.
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