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Posts Tagged ‘Math Formulas’

Question: Help with Tesla Coil Math Formulas please?

I already have the Tesla Coil. I want to measure the inductance of the secondary coil. Can I do that without using my Fluke LCR Meter? I have also an volt/ohm meter from Radio Shack. I think there’s some Math Formulas I remember from elctronics classes where you can find other ways around using the LCR meter. If you can’t do it one way, you can do it another?

Answer: What is your operating frequency? Because I have an idea, and you will need the components and meters described below. Choose a frequency which is at that operating frequency.

Do you have a function generator or borrow one:

http://en.wikipedia.org/wiki/Function_generator

Have a collection of resistors ready. You can get lots of them in variety kits at the same place you mentioned, Radio Shack.

Is that other meter an AC voltmeter? You will need one.

Now apply about 10 VAC or so across a resistor and the coil in series.

The AC voltmeter will measure the voltage across the resistor. Then do the inductor.

This is trial and error, adjust or change the resistor value until the two voltages are equal.

The formula you are probably thinking about is:

XL = R = 2 π f L

XL is inductive reactance
R is the resistance
f is frequency
L is inductance
π of course is pi

2 π f L = R

Solve for L by dividing both sides by 2 π f:

(2 π f L)/(2 π f) = R/(2 π f)

This becomes:

L = R/2πf

Simple Interest Formula – YourTeacher.com – Math Help

Cubic equations are equations in the following form. The highest power of x in cubic equations is 3, meaning that the coefficient a of x cube cannot be zero. If a is zero then the equation is not a cubic equation. Below are roots of cubic equations. Roots of cubic equations are useful in solving cubic equations and factoring cubic equations. We will deal with how to solve cubic equations and step by step cubic equations in another section. For this section, we introduce cubic equations and the roots of cubic equation formulas.

Cubic equations can be written in the above form.

Roots of cubic equations

When solving cubic equations, if the roots of the cubic equation are given by:

Then the following Math Formulas are true for the cube roots of the cubic equation.

Math formulas are important when solving Math Homework Problems. Knowing math formulas allows you to solve math problems quickly. When you learn more advanced math, math formulas become less and less useful. This is because beyond college level mathematics, you need to do all your math proofs from scratch from the basics. The need to prove from first principals becomes more and more important.

Math formulas have many practical uses in everyday life. Math formulas are not only useful in math but in physics, business, finance, and economics for examples. We will review some math formulae here on this Math Help website to help you with math homework.

• Area of a Circle
• Formula for Area of a Circle
• Volume of a Sphere
• Area of a Trapezoid
• Convert Decimal to Fraction
• Quadratic Formula
• Slope of a Line
• Calculate Percentage Increase
• Fubini ’s Theorem
• Polar Coordinates
• Binomial Expansion
• Mean + Variance