I am a relative beginner, although I did do an Electronics course a few years ago, but have forgotten quite a bit of it.
At the moment, I'm studying Potential Divider circuits. To help me understand it a little better, I set up a little series circuit with 3 resistors and a lamp, on my breadboard. 6 Volts battery supply. Resistors of l5.2 ohms, 10.1 ohms and 56.8 ohms. I measured resistance of the 6 volt lamp, which appeared to be 4.5 ohms.
I was really looking forward to getting a nice neat result, that is, I was hoping that the sum of voltage drops across resistors and lamps would equal the battery voltage.(just like it says in the text books) Unfortunately though, I got the following results:
VOLTAGE DROPS ACROSS 3 RESISTORS & LAMP
R1= 0.724V
R2=0.482V
R3=2.72V
Lamp=0.890
According to my calculator, this makes a total of 4.816 Volts.
Yet the Voltage at my battery measured 5.55 Volts.
So what has happened to the other volts?
That is, there seem to be 734mV missing.
I would be grateful if someone who is a little more advanced in Electronics than I could make some suggestions! Thanks.
At the moment, I'm studying Potential Divider circuits. To help me understand it a little better, I set up a little series circuit with 3 resistors and a lamp, on my breadboard. 6 Volts battery supply. Resistors of l5.2 ohms, 10.1 ohms and 56.8 ohms. I measured resistance of the 6 volt lamp, which appeared to be 4.5 ohms.
I was really looking forward to getting a nice neat result, that is, I was hoping that the sum of voltage drops across resistors and lamps would equal the battery voltage.(just like it says in the text books) Unfortunately though, I got the following results:
VOLTAGE DROPS ACROSS 3 RESISTORS & LAMP
R1= 0.724V
R2=0.482V
R3=2.72V
Lamp=0.890
According to my calculator, this makes a total of 4.816 Volts.
Yet the Voltage at my battery measured 5.55 Volts.
So what has happened to the other volts?
That is, there seem to be 734mV missing.
I would be grateful if someone who is a little more advanced in Electronics than I could make some suggestions! Thanks.