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Find the unknown resistance value in a given circuit, given the bridge is balanced.
- a)10.2 Ω
- b)11.7 Ω
- c)10.5 Ω
- d)11.5 Ω
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Find the unknown resistance value in a given circuit, given the bridge...
Concept:
- A Wheatstone bridge is a special arrangement of 4 resistors. It can be used to find an unknown resistance.
- If the Wheatstone bridge is balanced, there will be no current flowing through the galvanometer.
- Wheatstone bridge is used to measure the resistance with the help of a comparison method.
- The Wheatstone bridge work on the principle of null deflection.
The bridge is balanced when: P/R = Q/S
Calculation:
Given that,
For a whetstone network, we have four resistance P, Q, R, and S, and their values are
P = 25 Ω
Q = 15 Ω
R = 17 Ω
S = ?
Balanced bridge: The bridge is said to be balanced when deflection in the galvanometer is zero i.e. no current flows through the galvanometer.
In the balanced condition P/R = Q/S, on mutually changing the position of cell and galvanometer, this condition will not change.
Most Upvoted Answer
Find the unknown resistance value in a given circuit, given the bridge...
Concept:
- A Wheatstone bridge is a special arrangement of 4 resistors. It can be used to find an unknown resistance.
- If the Wheatstone bridge is balanced, there will be no current flowing through the galvanometer.
- Wheatstone bridge is used to measure the resistance with the help of a comparison method.
- The Wheatstone bridge work on the principle of null deflection.
The bridge is balanced when: P/R = Q/S
Calculation:
Given that,
For a whetstone network, we have four resistance P, Q, R, and S, and their values are
P = 25 Ω
Q = 15 Ω
R = 17 Ω
S = ?
Balanced bridge: The bridge is said to be balanced when deflection in the galvanometer is zero i.e. no current flows through the galvanometer.
In the balanced condition P/R = Q/S, on mutually changing the position of cell and galvanometer, this condition will not change.
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