PreLab – Current Balance             Name:

 

1.     1x   What is the Lorentz force equation?

 

 

 

What is the magnitude of the Lorentz force formula induced by a current carrying wire?

 

 

 

How does the Lorentz formula for the force induced by a current carrying wire simplify, when the charge flow is perpendicular to the magnetic field?
  1. 1x   Make a sketch representing the right hand rule where the thumb indicates the direction of the current and the fingers, the direction of the B field?

(Do not forget to include the palm of the hand and what it indicates, see lecture book)

 
  1. 1.5x    Below is data from Part I of the lab using current loop SF42.  Calculate the magnetic field strength of the magnet assembly using the slope of force versus current.

 

            Use Linefit to graph your data.

 

4.    1.5x   Below is data for Part II.  Calculate the magnetic field strength of the magnet assembly using the slope of force vs length. 

 

Use Linefit to graph your data; please obtain current from your Lab Manual.

current

(Ampere)

mass

(grams)

m – m I=0

(grams)

FNet

(Newtons)

Length

(cm)

mass

(grams)

m – m I=0

(grams)

FNet

(Newtons)

0.0

159.07

0

0

1.0

159.23

 

 

0.5

159.39

 

 

3.0

159.53

 

 

1.0

159.68

 

 

6.0

160.02

 

 

1.5

160.01

 

 

8.0

160.32

 

 

 

y =  m   x +  b         slope:

F = LB   I +  0        y-int:

 

B =

 

y =  m   x +  b         slope:

F = IB   L +  0        y-int:

 

B =