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प्रश्न
What should be the value of R in the figure for which the current in it is zero?
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उत्तर
For current to be zero in the middle branch, the circuit should be balanced. According to the Wheatstone bridge principle, balancing a circuit does not depend on the value of resistance R in the middle branch. The circuit in this case is balanced. Hence, any value of R is acceptable.
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संबंधित प्रश्न
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c) What happens if the galvanometer and cell are interchanged at the balance point of the bridge?
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