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PHY-2022-CR6-046
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PHY · PHY-2022-CR6-046
Physics
Section B
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
Do not play any significant role
B
Should be approximately equal to 2X
C
Should be approximately equal and are small
D
Should be very large and unequal
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