Practice-Quiz3

# Practice-Quiz3 - a R b 2.5 R 2(1.5 points A permeable...

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Physics 7B Practice Quiz 3 First two letters of last name: DL Section Number ____________ Name (last, first) ____________________________ Student ID _______________________ I certify by my signature that I will abide by the code of academic conduct of the University of California. Signature No books or notes. Calculators OK. Show all your work below. Answers alone do not receive credit! 1. (3.0 points) Suppose you have four resistors, all with the same resistance R. Draw an arrangement of connecting the four resistors, using all four, that has an equivalent resistance of
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Unformatted text preview: a) R b) 2.5 R 2. (1.5 points) A permeable membrane allows 4 × 10 6 calcium ions per square centimeter per second to pass through it when the calcium ion concentration is kept at 8 ppm (parts per million) on one side, and very near 0 ppm on the other. If we double the thickness of the membrane, what is the ion current? Explain your reasoning in one brief sentence . transport equation for circuits: Δ V = E - IR power dissipation in a resistor: P = I 2 R...
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