A Wheatstone bridge is used to determine the value of unknown resistance X by adjusting the variable

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Q 47 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:

a. Should be approximately equal to 2X
b. Should be approximately equal and small
c. Should be very large and unequal
d. Do not play any significant role
NEET 2022

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