Volts = 180

Diameter of Beam = 11
Radius of Beam = D/2 = 0.055 (cm)
1/R (m) = 18.18
Current in Coil (I) = 1.02

My calculations for B is not coming out correctly
nor is my calculation for e/m

How do I go about doing this. I mean I think Im inputting it incorrectly into my calculator.

I am constantly trying with the formula but my answers aren't correctly coming out

You need to more completely state the problem. I don't see what a beam has to do wth a coil.

I tried inputting it like this exactly for B :

8 x 4pix10^-7x130x 1.02
------------------------------------------------
.055 x Sq.rt 125

I get my answwer to be .2709

When I plug that in for e/m by finding the slope

V squared
------------------
slope squared

2(180)
------------
.0250^2 ( this was the average slope of 2 points on my data)

= .00576

this is for sure incorrect because i cant even calculate the experimental error like this

Our data table which was given to us is set up in that way.

From the Diameter of the beam we took the radius in cm's

To calculate the magnetic field (B) and e/m (charge-to-mass ratio), you need to use certain formulas and ensure the correct input into your calculator. Let's go through the process step by step.

1. Magnetic Field (B):
The formula to calculate the magnetic field is given by B = (μ₀ * I) / (2 * R), where μ₀ is the permeability of free space, I is the current in the coil, and R is the radius of the beam.

First, convert the radius of the beam from centimeters to meters:
R (m) = 0.055 (cm) / 100

Next, substitute the values into the formula:
B = (μ₀ * I) / (2 * R)

μ₀ is a constant value equal to 4π × 10^-7 T m/A.

2. e/m (Charge-to-Mass Ratio):
The formula to calculate e/m is given by e/m = (2 * V * B²) / (D² * I²), where V is the voltage, B is the magnetic field, and D is the diameter of the beam.

First, calculate the value of B using the formula mentioned above.

Then, substitute the values into the e/m formula:
e/m = (2 * V * B²) / (D² * I²)

Ensure that you input the values correctly into your calculator, making sure to use the correct units (e.g., meters for length and Tesla for magnetic field).

By following these steps and double-checking your inputs, you should obtain accurate results for B and e/m.