Creative Work part 2

Last week we've already finished our creative work. We changed the values of our capacitors and inductors so that they will be close to each other. On the first try, the labquest showed a relatively good data compared to the last. It showed a sinusoidal wave function of voltage. When we tried it again, the results were not as good as the first. But nevertheless all the results in each run we made gives the sinusoidal wave we are expecting only that sometimes the period of the wave is not constant. These results may only because of the limitation of the detector we are using.

creative work part 1

We started our creative work last week. As I said before, our creative work is investigating the oscillations in an LC circuit. We used the labquest and voltage probe to see these oscillations. But what we saw is very far from what we expected. We expect something that is a smooth sinusoidal wave but we saw oscillations with varying amplitude through time. So next week we will try changing the values of the inductance of the inductor and capacitance of capacitor so that they will be close to each other. We suspected that the results we got is due to the big descrepancy in the values of capacitance and inductance we used.

Experiment 6 Electromagnetic Induction

The experiment is simple. We studied the relationship between a moving magnet and the current it induces in a wire specifically a solenoid.. we use the device called the galvanometer. The deflection of the needle in the galvanometer shows the magnitude and the direction of the current induced. We saw that the deflection of the galvanometer is very unnoticeable when we move the magnet towards the galvanometer slowly. When we drop the magnet in free fall towards the solenoid we saw a large deflection. Furthermore, we saw bigger deflection when we inserted another solenoid and iron bar inside the bigger solenoid. There are other ways to induce current like changing the current in the wire itself. By turning on and off the power source connected to the solenoid with another solenoid inside, we also observed deflection in the galvanometer.

Experiment 5: Magnetism

We did experiments on magnetism, We investigated the behavior of different kinds of magnet. We used a magnetic field sensor to determine the strength of magnetic field at any point around a magnet. When we did it, we only got two values at any point on a magnet. Maybe it's because we are using the sensor incorrectly or some other causes. But that part of the experiment is a failure for us. We also investigate the magnetic properties of a solenoid. We tried different radius of the coil of wire and we also inserted different materials in the solenoid.

RC Circuit

Last week, we continued our experiment on Capacitors. This time, we analyze the effect of resistor to the charge of the capacitor when they are connected in a circuit. A capacitor stores energy but the resistor takes away energy. We also analyzed what we called the time constant in charging and discharging the capacitor. We will also derive the formula of the relationship of current with the time constant. The experiment is just short so we finished early.

Experiment 4(Capacitors and Capacitance)

In this experiment we studied all about the capacitors and capacitance. The first thing we did was analyzing the structure of a capacitor which is so difficult because it is hard to break a small capacitors and see it's internal structure. The second part is to verify the effective capacitance of a charge capacitor that are connected in series and parallel connections. We are happ because the theoretical value is very close to what we got using capacimeter. The last part is to get a relationship between voltage, charge and capacitance. We can't really figure out how to do it because our problem is that the charge is an unmeasurable quantity. All we can measure is the voltage and capacitance. There will be a continuation of this experiment which is about the capacitor and resistor in a circuit. We will identify the behavior of an RC circuit. And, hopefully we can finally devise an experiment to determine the relationship between charge, voltage and capacitance.

Experiment 3(Kirchoff's rule)

This experiment is all about Kirchoff's rule. First we made some exercises on how to read voltage and current of resistors in a DC connection. Then we did the actual experiment. First I thought we will finish the experiment immediately but when we read the current reading in the resistors, we cannot find any reading. we replaced the multimeter suspecting there was something wrong with it but still nothing happens. we also replaced the wires but still the reading is zero.Then finally we had figured out that the resistance of the resistors are too big that when we compute for the current (I=V/R) the current is too low for the ammeter to read it.