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A wheat stone 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 :(1) should be approximately equal and are small(2) should be very large and unequal(3) do not play any significant role(4) should be approximately equal to 2X |
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Answer» (1) should be approximately equal and are small Resistance of P & Q should be approx. equal as it decreases error in experiment. |
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