A Hays bridge is often used for measuring the inductance of high Q coils and has theconfiguration shown in Figure 7.22. The inductance and resistance of the coil arerepresented in the figure by the symbols L1 and R1, respectively. (a) Obtain the bridge balance conditions.(b) Show that if the Q value of an unknown inductor coil is high, the expressionfor the inductance value when the bridge is balanced is independent offrequency.(c) If the Q value is high, calculate the value of the inductor if the bridge component values at balance are as follows: R2 = R3 = 1000 ohm ; C =0.02 mF 7.24 A Hays bridge is often used for measuring the inductance of high Q coils and has theconfiguration shown in Figure 7.22. The inductance and resistance of the coil arerepresented in the figure by the symbols L1 and R1, respectively.6 Chapter 7R2ellR4Figure 7.22Hays bridge.(a) Obtain the bridge balance conditions.(b) Show that if the Q value of an unknown inductor coil is high, the expressionfor the inductance value when the bridge is balanced is independent offrequency.(c) If the Q value is high, calculate the value of the inductor if the bridge compo-nent values at balance are as follows: R2 = R3 = 1000 2; C = 0.02 µF.

Hay's Bridge- These type of ac bridges are used to measure the unknown inductance applied in the…

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Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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A Hays bridge is often used for measuring the inductance of high Q coils and has the
configuration shown in Figure 7.22. The inductance and resistance of the coil are
represented in the figure by the symbols L1 and R1, respectively.

(a) Obtain the bridge balance conditions.
(b) Show that if the Q value of an unknown inductor coil is high, the expression
for the inductance value when the bridge is balanced is independent of
frequency.
(c) If the Q value is high, calculate the value of the inductor if the bridge component values at balance are as follows: R2 = R3 = 1000 ohm ; C =0.02 mF

7.24 A Hays bridge is often used for measuring the inductance of high Q coils and has the
configuration shown in Figure 7.22. The inductance and resistance of the coil are
represented in the figure by the symbols L1 and R1, respectively.
6 Chapter 7
R2
ell
R4
Figure 7.22
Hays bridge.
(a) Obtain the bridge balance conditions.
(b) Show that if the Q value of an unknown inductor coil is high, the expression
for the inductance value when the bridge is balanced is independent of
frequency.
(c) If the Q value is high, calculate the value of the inductor if the bridge compo-
nent values at balance are as follows: R2 = R3 = 1000 2; C = 0.02 µF.

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