A Wheatstone bridge is used to determine the value of unknown resistance \(\mathrm{X}\) by adjusting the variable resistance \(\mathrm{Y}\) as shown in the figure. For the most precise measurement of \(\mathrm{X}\), the resistances \(\mathrm{P}\) and \(\mathrm{Q}\):
             
 
1. do not play any significant role.
2. should be approximately equal to \(2\mathrm{X}\).
3. should be approximately equal and are small.
4. should be very large and unequal.
Subtopic:  Wheatstone Bridge |
 74%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh