Question

Notify Me Bookmark

You have a 74.1 mF capacitor initially charged to a potential difference of 10.9 V. You discharge the capacitor through a 3.39 Ω resistor. What is the circuit's time constant τ ? τ = s At what time t, expressed as a multiple nτ of the time constant, does the potential difference across the capacitor reach 1.29 V? t = τ

You have a 74.1 mF capacitor initially charged to a potential difference of 10.9 V. You discharge the capacitor through a 3.39 Ω resistor. What is the circuit's time constant τ ? τ = s At what time t, expressed as a multiple nτ of the time constant, does the potential difference across the capacitor reach 1.29 V? t = τ

Image text
You have a 74.1 mF capacitor initially charged to a potential difference of 10.9 V . You discharge the capacitor through a 3.39 Ω resistor.
What is the circuit's time constant τ ?
τ =
◻ s At what time t , expressed as a multiple n τ of the time constant, does the potential difference across the capacitor reach 1.29 V ?
t = ◻ τ

Detailed Answer

0 0

Please enter your email here. You will get email when this question is answered by our tutor.

Doubtrix Logo

Problem is not yet solved!

Click on Notify me to get email when question is answered.

Join Doubtrix with 7-days free trial

  • Icon Correct & Verified Answers
  • Icon No AI-Generated Answers
  • Icon Video Solution for Difficult Questions
  • Icon Work With Experts to Reach at Correct Answers
Notify me Login Sign Up

Similar/Related Questions

(Equivalent Resistance and RC time constant) In the following circuit, the capacitor CL = 726 fF is initially charged to VDD = 2.5 V before Vin switches to zero as shown in the figure bellow. The threshold voltage of PMOS, VTP = -0.9 V. If we replace M1 with a resistor R = 12 KΩ when conducting, a) How long does it take for the capacitor to discharge to VDD/2 ? b) What is the final voltage on the capacitor? How long does it take for the capacitor to get to this final voltage? c) Sketch the voltage across CL as a function of time. Assume no leakage current exists. d) Using no more than three sentences, and/or a sketch, indicate the main difference(s) between the voltage as a function of time curve for the resistor-switch model and a real PMOS.
Solution
0 0

This problem deals with several aspects of an oscilloscope. You have an 14700 volt supply (Vsupply) for accelerating electrons to a speed adequate to make the front phosphor-coated screen glow when the electrons hit it. Once the electron has emerged from the accelerating region, it coasts through a vacuum at nearly constant speed. You can apply a potential difference of plus or minus 35 volts (Vplates) across the deflection plates to steer the electron beam up or down on the screen to paint a display (other deflection plates not shown in the diagram are used to steer the beam horizontally). Each of the two deflection plates is a thin metal plate of length L = 8 cm and width (into the diagram) 4 cm. The distance between the deflection plates is s = 5 mm. The distance from the deflection plates to the screen is d = 34 cm. When there is a 35 volt potential difference between the deflection plates, what is the deflection y of the electron beam where it hits the screen? An approximate treatment is fine, but state your assumptions. As is usually the case, it pays to carry out all of your calculations algebraically and only evaluate the final algebraic result numerically. Note the exaggerated vertical scale: the deflection is actually small compared to the distance to the screen. When leaving the accelerating plates, the electron's speed is close to the speed of light. Therefore, you must use K = (γ − 1)mc2 where γ = 1 /1 − (v/c)2 and c is the speed of light, 3×108 m/s. m
Solution
0 0

An initially uncharged 4.95 μF capacitor and a 7.17 kΩ resistor are connected in series at time t = 0 to a 1.50 V battery that has negligible internal resistance. What is the initial current I0 in the circuit in milliamperes? I0 = mA Calculate the circuit's time constant τ in milliseconds. τ = ms How much time t, in milliseconds, must elapse from the closing of the circuit for the current to decrease to 2.29% of its initial value? t = ms
Solution
3 0