1. An RC circuit is given a step voltage (charging) of V at t = 0 seconds. What

Question

1. An RC circuit is given a step voltage (charging) of V at t = 0 seconds. What is the value of voltage at t = 2RC?
2. If the conductance of a single ion channel is 1pS and its capacitance per cm2 is 1mF and the time constant for a human neuron is 1ms:
(a) What is the resistance per cm2 of a neuronal membrane?
(b) How many ion channels on average must there be in one µm2 of neuronal membranes?
3. What are the electrical charge carriers in (a) computers and in (b) biology? *A/N I know for biology its ions, what about computers? electrons?
4. Give two examples of a bacterial ion channel and the bacterium
5. Which of these statements is true?
a) Membrane capacitance decreases as a result of water in the bilayer
b)The thicker the membrane the larger the capacitance
c)The thicker the membrane the larger the conductance
d)The thinner the membrane the larger the capacitance
6. What is the time constant of this circuit? (see Fig 1)
7. Draw a graph of voltage change (different levels) versus current flow at each level or voltage. No numbers are required just the general shape of the curve. What will be the change in slope if a higher resistor is used? (see Fig 2)

Please help me with any questions you know, it'd be great if you can include steps for calculation questions. Thanks in advance!!

Explanation / Answer

Q1.
V(t) = V(1-e^-t/RC)
V(2RC) = V(1-e^-2RC/RC)
V(2RC) = V(1-e^-2)

Please post other questions separately.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.