7:04 Take Quiz Exit Exam 2 (CH 24-28) Started: Apr 21 at 7:03pm Quiz Instructions D Question 5 1 pts A parallel-plate capacitor

Physics

Capacitors Solutions

You have an RC Circuit hooked up to a battery that you are testing for your company. This consists of a battery, resistor and capacitor all in series. You can assume the battery is ideal (no internal resistance). You need to know how long it takes (time) in order for the capacitor to store 84.9% of the maximum possible energy for this circuit. The values for the battery, resistor and capacitor are below. Battery = 4.85 V Capacitor = 40.00 micro Farads (UF) Resistor = 169.00 kilo Ohms (k.2) Make sure to include units with your answer. Hint: This is NOT the same question as asking how long it takes to have 84.9 % of the maximum voltage across the capacitor. Think about how the capacitor energy and voltage relate to solve this.

Physics

Capacitors Solutions

Problem 5: LC circuit The switch in the circuit in the figure below has been in position 1 for a long time. It is changed to position 2 at time t = 0. Give your answers to the following questions in terms of the given quantities: R, L, C, and Vo. R w lelle a) What is the maximum current through the inductor? (Hint: Recall how current is related to charge on the capacitor. Think about how you will determine Q(t).) b) What is the first time at which the current is maximum?

Physics

Capacitors Solutions

Review | Constants Part A Cell membranes (the walled enclosure around a cell) are typically about d = 7.7 mm thick. They are partially permeable to allow charged material to pass in and out, as needed. Equal but opposite charge densities build up on the inside and outside faces of such a membrane, and these charges prevent additional charges from passing through the cell wall. We can model a cell membrane as a parallel-plate capacitor, with the membrane itself containing proteins embedded in an organic material to give the membrane a dielectric constant of about 12. (See (Figure 1).) What is the capacitance per square centimeter of such a cell wall? Express your answer in microfarads per squared centimeter. AEO RE ? For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Effect of a dielectric C= 8.73 • 10-9 4F/cm² Figure 1 of 1 Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining d Outside axon + V + + + + + + + + Axon membrane y Part B ✓ In its normal resting state, a cell has a potential difference 85 mV across its membrane. What is the electric field inside this membrane? Inside axon Express your answer in volts per meter.