A capacitance of 250 pF produces resonance with a coil at a frequency of \(\left( {\frac{2}{\pi }} \right) \times {10^6}\) Hz, while at the second harmonic of this frequency, resonance is produced by a capacitance of 50 pF. The self-capacitance of the coil will be nearly

A capacitance of 250 pF produces resonance with a coil at a frequency

1.	A capacitance of 250 pF produces resonance with a coil at a frequency of \(\left( {\frac{2}{\pi }} \right) \times {10^6}\) Hz, while at the second harmonic of this frequency, resonance is produced by a capacitance of 50 pF. The self-capacitance of the coil will be nearly
A.	16.7 pF
B.	20.5 pF
C.	24.3 pF
D.	28.1 pF
Answer» B. 20.5 pF