052814 PHysics 4b*

This experiment was about seeing the relationship between magnetic field and and area. Their relationship is that they are proportional. We learned that the flux at 90 degrees is zero and at 180 it is -BA. If the magnetic field is constant but the area changes. The area will equal to the velocity* length.

This is an apparatus of a coil with a function generator with a resistor. This is connected to a oscilloscope where we got the wave below. 

This is the wave we got through out apparatus above. The bottom of the formation is the level zero. To find the time constant torr(L) =  t (1/2) /  ln(2) where t (1/2) is equal to half the emf produced above.  the graph is Inductor Voltage (y-axis) and time (secs (x-axis ).

Extra Credit 052414

Today was a Young Engineers and Scientists Professional Forum, Hosted by the Chinese Institute of Engineers. Six Panelists Alex Yang, Micah Norris, Steve Tseng, Ginger Han, Ru Xiao, and Zhongbo Li. They discussed there application process for jobs, aspects of Employers  are looking for in a resume, and what employers expect. 

 Important key points taken from this panel were that there has to be a balance between work experience and grades while in school. After getting your B.S.  degree it is all about selling yourself to Employers. Although, a person majors in a certain field after job searching they may end of into something not related in a good way.  

051914 Physics 4B

This is the apparatus of magnetic field measuring device. To the right we measure how many amps were going through. Different variations would be how many loops we went around the tube. We made the white dot point upwards. While adding loops we measured  current through.     

 Some constants through this would be that the current did not change. To the left would be what we calculated. Some weird things would be that with 2 and 3 loops the magnetic field would be lower than one loop, then with 4 loops the field would increase. The chart to the right is different because the apparatus was shape with the ring and white dot pointing in the same direction making the more loops increase. 

 This chart shows magnetic field with varying loops. This graph makes sense because in relation to the chart listed to the right from above the more loops added the higher the magnetic field.

 Above would is an experiment using coils a magnet and a galvanometer. The different ways we could make the galvanometer read higher current was to add more coils, the speed of the magnet entering the coil, and using a stronger magnet.

 This experiment used two coils an Alternating current (A/C power) and a Christmas light. What is going on in this picture is that the red object seen controlling how much power is going through. By using it switches up and down.  When Professor Mason lowers the coil with Christmas light will emit light. This technology is similar to a Phone charger. Where current is sent through in opposite directions making power travel.

051414 Physics 4B*

This is a picture of the apparatus of used this experiment. This simulates a ring wrapped around a cardboard ring. Used in the is experiment with a power supply varying the amount of current will defect the compass to the right a certain amount of degrees.  

This graph shows the magnetic field of the earth. We calculated the current going through a loop that is wrapped around 30 times. We calculated the magnetic field (B) for the earth and the coil (Bcoil=Bearth*tan(theta)).

The last experiment was Professor Wolfe displaying a spring in relation to looking at a solenoid. A current is then sent through the solenoid. Using a probe which measured the magnetic field. This was  as also calculated making it a ring looped around a number of times using mu(0)*(N/L). 

05/12/14 Physics 4b*

This is a magnetic motor where depending on the current direction will make the motor spin clockwise or counter clockwise. Depending on how much current was going through the fast the inside will turn. But when under those the current will begin to arc and a build up of carbon will block current going through.

Electric motor: The way we made this was shaving off the coat off one end and shave half another end. What happens when the ring becomes horizontal it will stop because it has no magnetic field. Shaving half will make the ring have some momentum to continue spinning.

This experiment related the magnetic field due to current. The three point were when the two currents would flow in different directions, one current flowing in one direction, and both going in the same direction. The direction of the magnetic field was determined by a compass. For the two currents in opposite directions the compass pointed north meaning no deflection. One current was deflected to the right ,as well as the two currents going in the same direction deflected also

050714 Physics 4B*

This shows using a magnetic field of a magnet.  The lead filing show the two dimensional field. The field lines towards the middle of each pole are straight lines, but the it will gradually curve towards the other pole. 

Our example of what is going on in a magnet. This is our prediction of what the field lines would be line  

This shows our rendition of the field around the magnet using a compass. The north pointer of the compass would be where the field would be pointing.

This is the apparatus of copper pipe that began to role away from a magnet. Depending of the way the current is going through will either attract or push away. The following data will show the magnetic field. The unique part of the would be calculating the force which has to calculate the translational and rotational part for the force. 

The answer was 22.2x10^-3 Tesla. Calculating the force. There are two things that we need to calculate rotational and linear force. Which we need to calculate the acceleration.  Given the information we calculated the acceleration to be 0.23m/s^2.  

050514 Physics 4b*

Todays experiment was transistors 

Picture schematic of amplifier 

Using a function generator, oscilloscope, power supply and our breadboard with the above schematic.

In the picture showed above there is a sign wave going the middle which is from the power supply. Then the back shows the slamming of the sign wave going flat and then amplify the signal  

Close up of bread board 

The second experiment was to make a amplifier and play music from our phone's 

 This is a picture of the bread board for the amplifier 

043014 Physics 4b*

Today we were getting accustomed to an oscilloscope  

Using a function generator to make a sin wave and a speaker to make it make music.

Picture of a sine wave 

Picture of a square wave 

This is a picture of a power supply that we tested 

The last experiment each group was given a mystery box

The black mystery box 

   List of different combinations 

This was given by the combination of Green and black