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NEET-XII-Physics

02: Electrostatic Potential And Capacitance

Qstn# 6-a Prvs-QstnNext-Qstn
  • #6-a
    What is the total capacitance of the combination?
    (b) What is the potential difference across each capacitor if the combination is connected to a 120 V supply?
    Ans : Capacitance of each of the three capacitors, C = 9 pF

    Equivalent capacitance (C’) of the combination of the capacitors is given by the relation,

    1C’=1C+1C+1C⇒1C’=19+19+19=13⇒C’=3pFTherefore, total capacitance of the combination is

    3pF.
    (b) Supply voltage, V = 120 V

    Potential difference (V‘) across each capacitor is equal to one-third of the supply voltage.



    Therefore, the potential difference across each capacitor is 40 V.
  • #6-b
    What is the potential difference across each capacitor if the combination is connected to a 120 V supply?
    Ans : Supply voltage, V = 120 V

    Potential difference (V‘) across each capacitor is equal to one-third of the supply voltage.



    Therefore, the potential difference across each capacitor is 40 V.