Numerical - Self capacitance of coil for given resonance & resonating capacitance value

Q.  At 2 MHz, the resonance is obtained with a resonating capacitance value of 12 pF and at 400 kHz, the resonance is obtained with resonating capacitance value of 320 pF. Then the self capacitance of the coil is
- Published on 10 Nov 15

a. 0.62 pF
b. 0.83 pF
c. 1.2 pF
d. 1.5 pF

ANSWER: 0.62 pF

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