Question

Limitation of wheatstone bridge in resistance measurement

Answer 1

“The Wheatstone bridge is an instrument used to measure electrical resistance by means of balancing a bridge circuit.  The Wheatstone bridge works on the principle of null deflection.”

 

Limitation of Wheatstone bridge:

 

“It is not susceptible to high dc current.”

“It may give inaccurate readings if not balanced.”

“The Wheatstone bridge measures resistance from few “ohms” to “megohms.”

 “The upper range of the bridge can be increased with the help of the applied “emf”, and the lower range is limited by connecting the lead at the binding post.”

Answer 2

ANSWER

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1. It may give inaccurate readings if not balanced."




2. "The Wheatstone bridge measures resistance from few "ohms" to "megohms."




3. "The upper range of the bridge can be increased with the help of the applied "emf", and

4. lower range is limited by connecting the lead at the binding