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
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
We know, a wheatstone bridge is said to be most precise when it is most sensitive. This can be done by making ratio arms equal and small. Thus, option (B) is correct.
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