HP 50g: Magnetism - Straight Wire & more

A magnetic field is the magnetic effect of electric currents and magnetic materials. 

In this blog, using the HP 50g, I will show you how to get to the built in equation library and solve equations for 

straight wire magnetism. The units for such is Tesla. 

If you are required to answer in Gauss you will need to convert.

After turning on your HP 50g:

1. Press APPS
2. Scroll down to #12 or type in 12 (Equation Library)
3. Press OK. If Soft Menu mode is on you will see four boxes. Eqlib  Colib Mes Utils. Choose EQLIB. This is for the equation library.
4. In the library there are many choices. Today we will explore Magnetism. Go ahead and scroll down, press ENTER.
5. This brings us to today's topic. Straight Wire. Press ENTER. You should now see the see the equation. The soft key choices are now 

• Solv Equ Vars Pic -->Stk Exit

1. PIC will show you a visual of the straight wire equation.
2. Vars gives a description of each variable that can be used in the equation.
3. EQN is the equation itself. The --> Stk puts the equation onto the stack.
4. The main soft key choice is Solv. This is the equation solver. To enter numerical information you must first key in the constant ex: 5_cm radius and 4_A current; -press 5 then press F2B the key directly under the r soft key menu, then 4 and F4Dfor current...soft key menu I.
5. Now to solve for B we must first press the White Right Shift key <-- and then F5E (B soft key menu)

Then solver should output the answer. Play around with different equations to get a feel for the powerful HP 50g!

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HP 50g - Step-by-Step Mode

HP 50g - Graphing Rose Petals - Polar Graphs

Graphing Rose Petals - HP50g

Written by: Larsha Johnson

4/3/2015

How to graph a rose petal on the HP50g. Rose curve equations have two forms: 

1. r = a cos(nθ) and 
2. r = a sin(nθ) 

where a ≠ 0 and n is a positive integer. Petals have length determined by a. If n is odd, the number of petals is n. However, if n is even, the number of petals is 2n.

The simplicity and symmetry of Rhodonea or rose curves have fascinated mathematicians since they were first named by the Italian mathematician Guido Grandi in the 1700s. We were fascinated by an interesting pattern created by counting the number of petals of these curves.

In mathematics, a rose or rhodonea curve is a sinusoid plotted in polar coordinates. This concept is studied in Precalculus or Calculus.

Students will understand the role of the values of a and n in the equation r = asin(nθ).

Students will be able to predict the number of petals and their length by examining the polar equation.

Student will understand the relationship between the equation of a rose curve and the equation of a sinusoidal function.

Vocabulary

amplitude

frequency

rose curve

sinusoidal function

HP 50g - Double Integrals in Equation Writer

Use your HP 50g to solve Double Integrals in Calculus 3. New videos every Sunday. Grab your graphing calculator and Subscribe. See you there.

HP 50g - Periodic Table

The HP 50g is a powerful calculator. Find out just what it can do every Sunday. Subscribe to our YouTube Channel. Bits4Bots