Home › Bihar Board Class 12 (Science) › Physics › Current Electricity › Why is a Wheatstone bridge used with strain gaug…
Why is a Wheatstone bridge used with strain gauges?
ATo raise the gauge voltage
BTo store charge in the gauge
CTo avoid using any meter
DTo sense tiny resistance changes
Answer & Solution
Correct answer: D. To sense tiny resistance changes
The resistance change for a given strain is only a small fraction of the range, and the bridge measures such small changes with high accuracy.
Related questions
Which mobile charge carriers conduct current in an electrolyte?The resistivity of a semiconductor can be lowered by which process?Which one of these materials is classed as an insulator on the basis of its resistivity?In the free electron model of a metal, what is the average time between successive collisiWhat is the SI unit of the mobility of charge carriers?The electrical resistance of a strain gauge is proportional to which quantity?The ratio arms P and Q of a post office box contain which set of resistance values?A post office box is a practical form of which instrument?