A wheatstone bridge is used to determine the value of unknown resistance X by adjusting the variable resistance Y as shown in the figure. For the most precise measurement of X, the resistances P and Q [2022]
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should be approximately equal to 2X.
should be approximately equal and are small
should be very large and unequal
do not play any significant role
(2)
For a balanced Wheatstone bridge, current through a galvanometer is zero.
Here resistances P and Q should be approximately equal and small, as it decreases error in experiment.
