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प्रश्न
- Assertion (A): The given figure does not show a balanced Wheatstone bridge.
- Reason (R): For a balanced bridge small current should flow through the galvanometer.
पर्याय
Both Assertion (A) and Reason (R) are true and (R) is the correct explanation of (A).
Both Assertion (A) and Reason (R) are true and (R) is NOT the correct explanation of (A).
Assertion (A) is true and Reason (R) is false.
Assertion (A) is false and Reason (R) is also false.
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उत्तर
Assertion (A) is true and Reason (R) is false.
Explanation:
For a balanced Wheatstone Bridge,
`P/Q = R/S`
⇒ `2/3 = 3/2`
0.67 = 1.5
`P/Q ≠ R/S`
As a result, it isn't a balanced Wheatstone bridge. The current through a galvanometer must be zero in the case of a balanced Wheatstone bridge. As a result, the reason is incorrect and the statement is correct.
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संबंधित प्रश्न
Explain with a neat circuit diagram. How you will determine the unknown resistances using a meter bridge.
The resistances in left and right gap of a metrebridge are 20 `Omega` and 30 `Omega` respectively. When the resistance in the left gap is reduced to half its value, the balance point shifts by ______.
In the meter bridge experiment, a null point was obtained at a distance of ℓ from the left end. The values of resistances in the left and right gaps are doubled and then interchanged. The new position of a null point is ______
The measurement of an unknown resistance R is to be carried out using Wheatstones bridge (figure). Two students perform an experiment in two ways. The first students takes R2 = 10 Ω and R1 = 5 Ω. The other student takes R2 = 1000 Ω and R1 = 500 Ω. In the standard arm, both take R3 = 5 Ω. Both find R = `R_2/R_1 R_3` = 10 Ω within errors.
- The errors of measurement of the two students are the same.
- Errors of measurement do depend on the accuracy with which R2 and R1 can be measured.
- If the student uses large values of R2 and R1, the currents through the arms will be feeble. This will make determination of null point accurately more difficult.
- Wheatstone bridge is a very accurate instrument and has no errors of measurement.
The figure below shows a balanced Wheatstone network. If it is disturbed by changing P to 22Ω, then which of the following steps will bring the bridge again to a balanced state?
In a Wheatstone bridge, what happens when the galvanometer shows zero deflection?
What does an unbalanced Wheatstone bridge indicate in a network?
What would happen if the galvanometer in a Wheatstone bridge were replaced with a voltmeter?
In a Wheatstone bridge with \[R_1 = 200 \Omega\], \[R_2 = 300 \Omega\], and \[R_3 = 120 \Omega\], what is the value of the unknown resistance \[R_4\]?
