Reread the section on error propagation in the lab manual. You want to determine

Question

Reread the section on error propagation in the lab manual. You want to determine the energy stored in a capacitor for a given voltage. You measure the capacitance C and the applied voltage V and calculate the energy from U = 0.5CV^2. Which of the quantities, C or V, should you measure most carefully (with the smallest relative uncertainty) to obtain the most reliable value (smallest relative uncertainty) for U? You should measure C and V equally carefully because both enter the equation for U. V because its value is usually larger than the value of C. V because it is squared in the equation. C because you cannot trust the printed value of a capacitance. A stretched string is supported by two bridges a distance L apart. You are driving the string with an inductive coil and find the lowest resonance frequency at 100 Hz. Now you move the bridges a little so that the distance between them is 10% larger than before. The new resonant frequency is the same as it was before. is smaller than it was before. is larger than it was before. may be larger or smaller; one needs more information to decide.

Explanation / Answer

Question 1

C ) V because it is squared in the equation

Question 2

A) its the same as befor

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