Short distances are measured by using capacitance

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Reference no: EM13655279

In some experiments, short distances are measured by using capacitance. Consider forming an LC circuit using a parallel plate capacitor with plate area A, and a known inductance L. (a) If charge is found to oscillate in this circuit at frequency f = ω/2π when the capacitor plates are separated by distance x, show that x = 4π^2*A*εo*f^2*L. (b) When the plate separation is changed by Δx, the circuit's oscillation frequency will change by Δf. Show that Δx/x ˜ 2(Δf/f). (c) If f is on the order of 1 MHz and can be measured to a precision of Δf= 1Hz, with that percent accuracy can x be determined? Assume fringing effects at the capacitor's edges can be neglected.

Reference no: EM13655279

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