DC & RC Circuits: Proving Energy Distribution

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SUMMARY

The discussion focuses on the energy distribution in an RC circuit where a capacitor is charged by a battery with no internal resistance. It is established that exactly 50% of the total energy supplied by the battery is stored in the capacitor, while the remaining 50% is dissipated as heat in the resistor. This conclusion holds true regardless of the specific values of resistance (R) and capacitance (C). The analytical proof provided confirms this energy distribution principle in RC circuits.

PREREQUISITES
  • Understanding of RC circuit components (Resistor, Capacitor)
  • Knowledge of energy conservation principles in electrical circuits
  • Familiarity with Kirchhoff's laws
  • Basic calculus for analyzing circuit behavior over time
NEXT STEPS
  • Study the mathematical derivation of energy distribution in RC circuits
  • Explore the impact of varying resistance (R) and capacitance (C) on charging time
  • Learn about energy dissipation in resistive components
  • Investigate real-world applications of RC circuits in timing and filtering
USEFUL FOR

Electrical engineering students, circuit designers, and anyone interested in the principles of energy distribution in electrical circuits.

jm2612
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In the RC circuit shown, the resistance R, the Capacitance C, and the emf of the battery are all given quantities. The battery does not have internal resistance and the capacitor is fully charged after the switch is closed. Prove analytically that, regardless the values of R and C, exactly 50% of the total energy provided by the battery in the charging process is stored up in capacitor, and the other 50% is consumed by the resistor.
 
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