Why Does My Series Circuit Show a Voltage Discrepancy?

[Ry122]

I setup a series circuit with 3 bulbs and I measured the voltages across each one
The potential differences were
A: 1.75V
B:1.6V
C: 1.75V
The sum of these voltages was 5.1V
The voltage measured across all three bulbs was 6V.
What are some possible causes for this discrepancy of .9V?

Also can someone tell me why bulb B's voltage is different from bulb A and bulb C?

 

[TVP45]

Did you use a calibrated meter?
What type of connections are used in this circuit?
Did you measure from A-B, B-C, C-D, and A-D where A,B,C,D represent specific points in the circuit?
Why shouldn't there be a difference of Voltage?

 

[ogb p]

I would first commend you on conducting a series circuit experiment and accurately measuring the voltages across each bulb. It is important to note that in a series circuit, the total voltage of the circuit is equal to the sum of the individual voltages across each component.

In regards to the discrepancy of 0.9V, there could be several possible causes. One possibility could be measurement error. It is important to ensure that all measurements are taken accurately and consistently to minimize any errors.

Another possible cause could be a difference in the resistance of each bulb. Resistance is the opposition to the flow of electric current and can vary depending on factors such as the material and thickness of the filament. Therefore, if one of the bulbs has a higher resistance, it would require a higher voltage to produce the same amount of current as the other two bulbs.

Furthermore, the discrepancy could also be due to the age and condition of the bulbs. As bulbs age, their resistance can change, resulting in a difference in the voltage required to produce the same amount of current.

As for the difference in voltage between bulb B and bulbs A and C, it could be due to the same reasons mentioned above. Each bulb may have a slightly different resistance, resulting in a slightly different voltage across each one.

In conclusion, it is important to take into consideration factors such as measurement error, resistance, and bulb conditions when analyzing the results of a series circuit experiment. Further experimentation and analysis may be necessary to determine the exact cause of the discrepancy and voltage differences between the bulbs.