The self-capacitance of a coil is measured by a 𝑄 meter. The circuit is set into resonance at 2 MHz and the tuning capacitor is 460 𝑝F. The frequency is now adjusted to 4 MHz and resonance conditions are obtained the tuning capacitor at 100 𝑝F . The value of self-capacitance of the coil will be:
A. 20 𝑝F
B. 30 𝑝F
C. 40 𝑝F
D. 50 𝑝F
Answer:A
The self-capacitance of a coil is measured by a 𝑄 meter. The circuit is set into resonance at 2 MHz and the tuning capacitor is 460 𝑝F. The frequency is now adjusted to 4 MHz and resonance conditions are obtained the tuning capacitor at 100 𝑝F . The value of self-capacitance of the coil will be:
A. 20 𝑝F B. 30 𝑝F C. 40 𝑝F D. 50 𝑝F