Frequency of an L-R-C Circuit AnL-R-C circuit has...

Frequency of an L-R-C Circuit
AnL-R-C circuit has aninductance of 0.490 , a capacitance of 2.15×10?5 , and a resistance of R. javascript:void(0);
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PartA
What is the angular frequency of the circuitwhen ?
Express your answer in radians persecond.

PartB
What value must R have to give adecrease in angular frequency of 8.00 compared to the value calculated in Part A?
Express your answer in ohms.

Answers ( 1 )

  1. marcel thiele
    marcel thiele
    Given that C = 2.15×10?5
                     L = 0.490
    a)
    If R = 0
    Then the formula for the angular frequency(? ) is
               
                  
                   =308.1rad/s
    b)
    Now given ? = (308.1rad/s) - (8/100)(308.1rad/s)
                           =283.45rad/s
    Now the formula for the angular frequency is
                   ....................(1)
    Here L = 0.490
             C =2.15×10?5
    Substitute the values of ?, L and C in the eq(1) and bydoing the calculation work we get the value of theresistance(R).

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