help In the circuit of the figure below, the switch S has been open for a long t

Question

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In the circuit of the figure below, the switch S has been open for a long time. It is then suddenly closed. Take epsilon = 10.0 V, R1 = 50.0 kohm, R2 = 185 kohm, and C = 10.0 muF. Determine the time constant before the switch is closed. S Determine the time constant after the switch is closed. S Let the switch be closed at t = 0. Determine the current in the switch as a function of time. (Use the following as necessary: t. Express your answer in units of muA.) I (t) = Determine the initial direction of the deflection of charged particles as they enter the magnetic fields shown in the figure below.

Explanation / Answer

a)

T = R1 C = 50e3 * 10e-6 = 0.5 s

b)

T = R2 C = 185e3 * 10e-6 = 1.85 s

c)

i = (emf/R2) e^(-t/R2C) = (10/185e3) * e^(-t/1.85) = 5.41E-5 * e^(-t/1.85)

question 8)

a) upward

b) out of the page

c) no deflection

d) into the page

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