അതിനാൽ, t 0 ന് തുല്യമാണെന്ന് സജ്ജമാക്കുമ്പോൾ, ഇത് ഒരു പ്രാരംഭ വ്യവസ്ഥയാണെന്ന് പറയുന്നു, അതിനാൽ സ്വാഭാവിക പ്രതികരണം സർക്യൂട്ടിന്റെ സ്വഭാവത്തെ മാത്രം ആശ്രയിച്ചിരിക്കുന്നു, ബാഹ്യ സ്രോതസ്സുകളൊന്നുമില്ലാതെ വാസ്തവത്തിൽ സർക്യൂട്ടിന് പ്രതികരണമില്ല, കാരണം കപ്പാസിറ്ററിൽ തുടക്കത്തിൽ സംഭരിച്ചിരിക്കുന്ന ഊർജ്ജം, അതിനാൽ സ്വാഭാവിക പ്രതികരണത്തിന് സർക്യൂട്ടിൽ വ്യാപിക്കുന്നതിനുള്ള ആന്തരിക ഊർജ്ജം മാത്രമേ ഉണ്ടാകൂ.
కాబట్టి ఎప్పుడు t విలువ సున్నా అవుతుందో అప్పుడు దానిని ఇనీషియల్ కండిషన్ అని అంటాము. కాబట్టి నేచురల్ రెస్పాన్స్ అనేది కేవలం సర్క్యూట్ మీద ఆధారపడుతుంది కానీ ఏ బయటి సోర్స్ మీద ఆధారపడదు ఎందుకంటే కెపాసిటర్ లో ఎనర్జీ ఇనీషియల్ గా స్టోర్ చేయబడుతుంది కాబట్టి సర్క్యూట్ లో ఇంటర్నల్ గా ఎనర్జీ విడుదల అవుతుంది దాని వలన నేచురల్ రెస్పాన్స్ వస్తుంది .