Discuss the advantages and disadvantages of the following techniques in the context of measuring transient signals.
(a) DC bridge circuits versus ac bridge circuits
(b) Slip ring and brush commutators versus ac transformer commutators
(c) Strain gage torque sensors versus variable-inductance torque sensors
(d) Piezoelectric accelerometers versus strain gage accelerometers
(e) Tachometer velocity transducers versus piezoelectric velocity transducers