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Homework Statement
A single phase half wave rectifier produces a DC signal ##V_{DC} = (4.6 \pm 0.78) V## and AC signal ##V_{AC} = (0.22 \pm 0.036) V##. What is the error on the efficiency?
Homework Equations
Functional dependence, propagation of error:
##\sigma_f = \sqrt{ (\frac{\partial f}{\partial x})^2 \sigma_x^2 + (\frac{\partial f}{\partial y})^2 \sigma_y^2 + ... }##
Efficiency:
##\eta = \frac{0.405}{1 + \frac{R_{Gen}}{R_{Load}}}##
The Attempt at a Solution
I'm actually not quite sure where to start this. Does the efficiency have a functional dependence on the AC and DC voltage somehow?
##V_{DC} = I_{DC}R_{Load}##
##V_{AC} = I_{AC}R_{Gen}##