4.5 V vs 9 V

 

 

 

We were given a quiz to create the dimmest possible lights. We set up our two 9 volt batteries in parallel, which produced less potential energy, and as a result would send less power to the two bulbs. In addition to putting the batteries in parallel we put the bulbs in series which would also draw less power and therefore create the best scenario for a dim circuit.

 

 

 

Here is a graphic representation we used to compare the temperature difference caused from the power (P= VI) delivered by  a 9 V and 4.5 V batteries. We used the idea of Q/t for the energy delivered to the water over time. and that the energy delivered would heat the water.

 

                           Here we used  the 9 V battery to find the heat, power and therefore the temperature difference. After, we used Delta T= Q/mC to calculate the uncertainty in our answer with the known values we were given or found.

 

 

 

 
 
 

 

 

Here we did the same calculations as we did for the 9 V battery to find the similar values 

 

After finding the uncertainties we found percentage of uncertainty, which we found to be 18.65% for the 4.5 V battery and 12.44% for the 9 V battery.