E401

Abstract

This experiment is all about magnets its magnetic field and magnetic force. The nature or movement of magnetic fields were showed visually through the use of iron fillings that were sprinkled around both the bar magnets magn ets and the U-magnets. The magnitude of a magnetic force and its relationship with the magnetic field was also determined in this experiment on a currentcarrying wire. In the experiment the magnetic force force was observed to be increasing increasing as the current increases. It is observed that while the angle is increased from 0 degrees to the maximum of 90 degrees and decreased from 0 degrees to the negative 90 degrees same magnitude of magnetic force was obtained whether it is from a positive or a negative angle. !nd it is also observed that the magnetic force is directly proportional to the magnetic field current length and the orientation of the current-carrying wire.

SAMPLE COMPUTATIONS Part 2

a. Trial " #btained $ata % 0.& g  F 

0.3 g ×

=

1 kg 1000 g

3

−

 F =2.94 × 10

× 9.8

 m s

2

 N 

 b. Trial & #btained $ata % 0." g 1 kg

 F 

0.1 g ×

 F 

9.8 × 10

=

1000 g

−

=

× 9.8

m 2

s

4

 N 

c. Trial " #btained $ata using '( )0 with *%".+cm % 0." g m 1 kg  F  0.1 g × × 9.8 2 1000 g s =

 F 

−

9.8 × 10

=

4

 N 

d. Trial , #btained $ata using angle θ

50 °

=

% 0." g 1 kg

 F 

0.1 g ×

 F 

9.8 × 10

=

=

1000 g

−

× 9.8

m 2

s

4

 N 

rror !nalysis In the second part of the experiment it is very hard to properly set the voltage to the exact amount re/uired which may or may not be of importance but some data are different even with only having a 0." difference in the voltage. 'ources of rrors The possible sources of errors in both parts of the experiment are for the first part is the incorrect positions of magnets and the shortage of iron fillings. (or the second part the wires

must not directly touch both the magnets and must only be between them. !nother source of error is the improper way of placing the magnet which would cause to obtain a data that is negative. Conclusion

This experiment deals with the study of magnets and its magnetic field and force. In the first part of the experiment the group has done a study which shows the nature of magnetic fields around the poles of magnets by spreading or sprinkling enough iron fillings that will serve as a mapping to show the behaviour of the magnetic field. This shows that like poles will repel and unlike poles will attract. The Iron ring in between the U-shaped magnets affected the distribution of magnetic flux. #n the second part the group set-up then conducted each sub-parts and collected data. The data obtained were in an increment pattern ust like in sub-part a1 where the number of magnets was adusted increasingly by one starting from two magnets to six magnets which resulted to the data 0.&g 0.)g 0.2g 0.,g and 0.3 g respectively. It was the same in sub-part b1 but the current was adusted increasingly by 0.2 from 0 to 2 !mperes gaining a 0 grams in the first two currents and having a data of increments again. #n sub-part c1 the 4urrent *oop was changed on each trial with '()0 '( &3 ' &9 '( &5 '( )" and '( )+. The results were still in increment having 0."g 0.&g 0.)g 0.,g 0.5g and ".0g respectively. *astly sub-part d1 is where the angles are adusted from 0 to 90 degrees to the positive and negative direction and the results were of the same value with the positive and negative angles with same signs meaning both have the same magnitude and direction when the magnetic force was computed. The results obtained by the group were in line with the formula derived which is

F = ILBsinθ

.

In conducting the experiment the group has observed that whenever the current magnets current loops and angles were adusted increasingly the result would also be in increment. This states that the magnetic force is directly proportional to the magnetic field current length and the orientation of the current-carrying wire.