Ask Question
30 July, 01:27

A 2.74 F and a 7.46 F capacitor are connected in series across a 40.0-V battery. A 10.1 F capacitor is then connected in parallel across the 2.74-uF capacitor. Determine the voltage across the 10.1 F capacitor.

+4
Answers (1)
  1. 30 July, 01:43
    0
    14.7 Volt

    Explanation:

    C1 = 2.74 F, C2 = 7.46 F, C3 = 10.1 F

    Here C1 and C3 are in parallel

    So, Cp = C1 + C3 = 2.74 + 10.1 = 12.84 F

    Now Cp and C2 are in series

    1 / C = 1 / Cp + 1 / C2

    1 / C = 1 / 12.84 + 1 / 7.46

    C = 4.72 F

    Let q be the total charge

    q = C V = 4.72 x 40 = 188.8 C

    Voltage across C2

    V2 = q / C2 = 188.8 / 7.46 = 25.3 V

    Voltage across C2 or c3

    V' = V - V2 = 40 - 25.3

    V' = 14.69

    V' = 14.7 Volt
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “A 2.74 F and a 7.46 F capacitor are connected in series across a 40.0-V battery. A 10.1 F capacitor is then connected in parallel across ...” in 📗 Physics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers