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.