Question
Download Solution PDFIf the radius of the wire of the meter bridge is doubled, what will happen to the balancing length?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
- Meter bridge: Meter bridge is instruments based on the principle of Wheatstone bridge and is used to measure an unknown resistance.
- In the case of a meter bridge, the resistance wire AC is 100 cm long. Varying the position of tapping point B, the bridge is balanced.
- If in the balanced position of bridge AB = l, BC (100 – l) so that
\(\frac{Q}{P} = \frac{{\left( {100 - l} \right)}}{l}\)
Also, \(\frac{P}{Q} = \frac{R}{S} \Rightarrow S = \frac{{\left( {100 - l} \right)}}{l}R\)
EXPLANATION:
- The balance point of the meter bridge is independent of the radius of the wire.
- Though the radius of the wire is doubled, it will not affect the ratio of the length of the 2 parts of the wire. Hence the balancing length will also not get affected. So option 3 is correct.
Last updated on May 31, 2025
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