Day13

1.Dim/Bright Circuits:

1. Set up a circuit that have the dimmest possible brightness of the light bulb, and another circuit with the brightest possible of the light bulb.

In a series circuit, the light bulb should be  dimmest because in a series circuit, the light bulb's net voltage equals total voltage that the battery has. It means each light bulb has lower voltage. But in the parallel, each light bulb has the voltage is equal to the battery, so it means in the parallel, the voltage is higher than the voltage in the series. Since, the light bulb in the parallel is brightest.

 Ohm's Law:
Experiment set up:
 Set up a power supply (able to change current and voltage) to inside a cup of water. To raise up the voltage and current to heat up the water in the cup. And record the changing.

Then, we calculated the theoretical value of final temperature of water can be raised by putting recorded voltage(hot, energy) into the water.

We calculated the theoretical value of final temperature of water is 53.2, but in the fact, the temperature is 43.1. This error is caused by changing in voltage and current. And during the heating, the some of energy and hot has already lose. Since, the true temperature is lower than the theoretical temperature.