The emf source, ɛ=4.5 V, of the circuit shown in the figure has negligible internal resistance. The resistors have resistances R1=2 Q and R2=4.7 Q. The capacitor has a capacitance C=4.9 µF. Determine the time constant t, in units of microseconds, for charging the capacitor. What is the charge Q on the capacitor in units of microcoulomb?
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