Why would voltage stay the same when a dielectric is introduced?

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SUMMARY

The introduction of a dielectric material in a capacitor system increases the overall capacitance, which is defined by the equation C = Q/V. In this context, while capacitance increases, the voltage across the capacitors remains constant due to the nature of the circuit configuration. Specifically, in a series circuit, the voltage across each capacitor is determined by the charge stored, which remains unchanged when a dielectric is introduced. Therefore, the voltage across capacitor 3 does not decrease despite the increase in capacitance.

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  • Understanding of capacitor fundamentals, including capacitance and voltage relationships.
  • Familiarity with the equation Q = CV, where Q is charge, C is capacitance, and V is voltage.
  • Knowledge of dielectric materials and their effects on capacitance.
  • Basic principles of series and parallel circuits in electrical engineering.
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I need an explanation for question 6. Why would voltage stay the same across capacitor 3?


The dielectric increases capacitance which is inversely related to voltage correct? The equation Q=CV says this. So shouldn't voltage decrease across capacitor 3?
 
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How do you get the voltage of C3 in the original set-up? How does the dielectric change all capacitance?

ehild
 
Yes the capacitance does increase but it does so for all three capacitors.Take another look at the question.


Hello ehild.You just beat me to it.
 

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