Calculate the time constant of the circuit. Calculate the time after switch S is

Question

Calculate the time constant of the circuit. Calculate the time after switch S is closed that the voltage across the combination of three capacitors is 65% of its final value. A split-ring commutator is used in a dc generator to A) rotate a loop so that it cuts through magnetic flux. B) reverse the connections to an armature so that the current periodically reverses direction C) reverse the connections to an armature so that the current does not reverse direction. D) prevent a coil from rotating when the magnetic field is changing. E) None of the above is correct. Three capacitors are connected as shown in figure below. Calculate is the equivalent capacitance between points A and B. A) 1.7 mu F B) 12 mu F C) 7.1 mu F D) 4.0 mu F E) 8.0 mu F

Explanation / Answer

According to the chegg guidelines I am allowed to answer only 1 question at a time.

22) 4 uF and 6uF in parallel

R(46) = 4 + 6 = 10 uF in series with 2uF

R(final ) = ( 1/ 10 + 1/2 ) ^ -1 = 1.666667uF or 1.70 uF ========ANSWER) OPTION A)

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