An uncharged capacitor with C = 35 μF and a resistor with R = 75 Ω are connected in series with a battery of ε = 3.5 V. 1) Express the time constant τ in terms of R and C.  2)Calculate the numerical value of τ in μs.  3)Express the maximum charge Q on the capacitor in terms of C and ε.  4)Calculate the numerical value of Q in μC.

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