Permanent Magnet

MOJICA, Aselle Joyce G. Group no. 3

PHY13l/A3 Seat no. 3-3

ANALYSIS

In PART 1 of the experiment which the is Magnetic Field of Permanent Magnets, we used two different magnets; two bar magnets and two U- magnets in order to see clearly what would be the result when magnets are placed in different orientations. For PART 1A, the bar magnets were oriented with like poles (N-N) facing each other. As a result after putting and scattering iron filings, each field line of the magnetic field from the north pole of the two magnets went away from each other which simply prove that like poles repel. The same procedure was used in getting the image of magnetic field for PART 1B, PART 1C and PART 1D, the only difference is that bar magnets

In PART 2A, we made use of the magnetic field which was represented by the number of magnets. From TABLE A, having 2 magnets in first trial gave a magnetic force of 0.9 g or 0.00882 N and when the number of magnets became 6 the magnetic force increased to 2.5 g or 0.0245 N. An increasing number of magnets yield to increasing magnetic force. Therefore, if other factors are held constant, the magnetic force is directly proportional to magnetic field (number of magnets). While for PART 2B, current was used to know the resulting magnetic force. From TABLE B, as the current from 0 increases with 0.5 increments, the magnetic force also increases. Therefore, magnetic force and current are directly proportional to one another while keeping the other factors constant. All the current loops from SF 37 to SF 42 were used in PART 2C. With their respective lengths, SF 40 having the shortest length (1.2 cm) resulted to 0.1 g magnetic force and SF 42 with longest length yield to 0.9 g magnetic force. The relationship between magnetic force and length of current loop is direct proportionality since as length increases, magnetic force also increases. Lastly, orientation of the coil, positive and negative angle, was used to determine the magnetic force in PART 2D. From TABLE D, as the angle increases the magnetic force also increases. Therefore they are directly proportional

When a magnet is cut into smaller magnets, they will also have the two poles. There is no magnetic monopole. Additionally, magnets also have magnetic fields created by moving charge or current. These magnetic fields have no ends since the magnetic field lines are illustrated as closed loop from North Pole to South Pole which definitely means that field lines never intersect. There is a greater magnetic field magnitude if field lines are close together. Magnetic field also exerts magnetic force which is given by the equation: F=IlBsinθ where F is the magnetic force, I is the current, B is the magnetic field and θ is the angle between I and B. From the equation, magnetic force is directly proportional to current, length of current loop, magnetic field and angle which were all proven in the experiment. In order to convert magnetic force in gram to Newton, the formula g *(1kg/1000g)* 9.8m/s2 (where g is the final reading in digital balance) should be used. By performing this experiment, I was able to visualize how magnetic field looks like and what factors may affect or change magnetic force. It also made me understand the relationship between magnetic force and magnetic field, magnetic force and current, magnetic force and length of current loop, magnetic force and angle. After applying the theories and concepts I learned the deeper meaning and was