Question

Determine the capacitance value in a turning circuit of a pizoelectric oscillator which generate ultrasonic wave of frequency 20MHZ.if its inductance vapue is 20 henry ​

Answer 1

Explanation:

To improve the quality of a basic soil, an acid should be added. Slaked lime (Ca(OH)

2

) and quick lime (CaO) are basic in nature. Urea is neutral. Hence, organic matter is the answer.

Answer 2

Answer:

C = 15.8 × 10⁻²⁰ F

Explanation:

Given,

Frequency, f = 20 MHz

• Convert MHz into Hz
• 1 MHz = 10⁶ Hz
• 20 MHz = 20 × 10⁶ Hz

Inductance, L = 20 henry

Capacitance, C = ?

We can find the capacitance by using the equation of frequency in terms of inductance given below:

$f = \frac{1}{2\pi } \sqrt{1/LC}$

$C = \frac{1}{4\pi ^{2} f^{2} L^{2} }$

$C = \frac{1}{4\pi ^{2} ( 20*10^{6} )^{2} ( 20)^{2} }$

C = 15.8 × 10⁻²⁰ F

RESULT: Capacitance = 15.8 × 10⁻²⁰ F