1.

In a L-C-R circuit capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be changed from L to …..

Answer»

4 L
2 L
`L/2`
`L/4`

SOLUTION :`omega_0=1/sqrt(L_1C_1)=1/sqrt(L_2C_2)`
`therefore L_1C_1=L_2C_2`
`therefore LC=L_2(2C)`
`therefore L_2=(LC)/(2C)=L/2`


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