physics test review question #4 help!~ 2. Cal A resistor and a capacitor are con

Question

physics test review question #4 help!~

2. Cal A resistor and a capacitor are connected to a switch. At time t- 0 the switch is thrown. The charge on the capacitor at a time tis given by: qot Q. (e "R"). Sketch the circuit and briefly describe what has happened from time t-0 to time t [b]If the resistance of the resistor is 200 k2 and the capacitor's capacitance is 5.00uF,what is the time constant for this arrangement? [c] The current through an inductor connected in series with a4uF capacitor oscillates with an angular frequency co 25 rad/s. What is the inductance of the inductor?

Explanation / Answer

b) T = R*c = 200*10^3*5*10^-6 = 1 s

c) w = 1/sqrt(L*C)

==> L = 1/(w^2*C)

= 1/(25^2*4*10^-6)

= 400 H

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