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TUTORIAL MAXWELL'S BRIDGE
In Maxwell’s capacitance bridge for calculating unknown inductance, the various values at balance are, R1 = 300 Ω, R2 = 700 Ω, R3 = 1500 Ω, C1 = 0.8 μF. Calculate R1, L1 and Q factor, if the frequency is 1100 Hz.
Answer: R1= 140 Ω
L1 = R2 R3 C4
= 300 × 700 × 0.8 × 10-6 = 0.168 H
Q = 8.29.
TUTORIAL HAY'S BRIDGE
TUTORIAL SCHERING BRIDGE
An Ac Bridge has the following constants :
Arm AB – a capacitor with 0.5 F in parallel with 1KΩ resistance
Arm AD – resistance of 2KΩ
Arm BC – capacitor of 0.5µF
Arm CD – unknown capacitor Cx and Rx in series
Frequency – 1Khz
Draw and label the circuit and determine the unknown capacitance and dissipation factor.
The solutions :
TUTORIAL WIEN'S BRIDGE
Find the equivalent parallel resistance and capacitance that causes a Wien bridge to null with the following component values.
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