answer both questions please. minus signs . However one resistor is marked incor

Question

answer both questions please.

minus signs . However one resistor is marked incorrectly. Which one is it? R1 R2 R3 R4 Capacitors in series and in parallel Three capacitors are identical, each having a capacitance C . Two of them are connected in series. Then, this series combination is connected in parallel with the third capacitor. What is the equivalent capacitance of the entire connection? 1/2C 1/3C 3C 2/3C 3/2C The time constant of an RC circuit is 2.6 s How much time t is required for the capacitor (uncharged initially) to gain one-half of its full equilibrium charge?

Explanation / Answer

the two capacitors in parallel

= C+C

= 2C,

then the 2C capacitor is in series with C,

1/Ctotal = (1/2C)+(1/C),

1/Ctotal = (1/2C)+(2/2C),

1/Ctotal = (3/2C),

Ctotal = 1/(3/2C),

Ctotal = (2C/3),

Ctotal = (2/3) C,

we choose answer d

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