Question:-
Match List-I (Bridge) with List-II (Parameter to be measured) and select the correct answer:
List-I
A. Maxwell’s bridge
B. Hay’s bridge
C. Schering Bridge
D. Wein bridge
List-II
1. Frequency
2. Inductance of medium Q- coils (1 < Q < 10)
3. Inductance of high –Q coils (Q > 10)
4. Capacitance
Option (A)
A B C D
4 3 2 1

Option (B)
A B C D
4 1 2 3

Option(C)
A B C D
2 1 4 3

Option(D)
A B C D
2 3 4 1

Correct Option:
(D)
Question Solution:
. The Wien’s bridge is primarily known as a frequency determining bridge. It may be employed in a harmonic distortion analyzer, where it is used as notch filter, discriminating against one specific frequency. The Wien’s bridge also finds applications in audio and HF oscillators as the frequency determining device
The Hay’s bridge is suited for the measurement of high Q inductors especially those inductors having a greater then 10. For inductors having Q greater then 10. For inductors having Q values smaller then 10, the term (1/Q)2 in the expression for inductance
L1 = {R2R3C4} / {1+(1/Q)2}
Becomes rather important and thus cannot be neglected. Hence this bridge is not suited for measurements of coils having Q less then 10 and for these applications a Maxwell’s bridge is more suited
question-answer-faq-3385