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A Wheatstone bridge is used to determine the value of an 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 $Q$ :

medium

Current Electricity

2022

physics

Should be approximately equal to $2X$

Should be approximately equal and small

Should be very large and unequal

Do not play any significant role

Explanation

To solve this problem, we need to understand the conditions for a balanced Wheatstone bridge. $\\$ In a Wheatstone bridge, the bridge is balanced when: $\\ \frac{P}{Q} = \frac{X}{Y} \\$

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A Wheatstone bridge is used to determine the value of an unknown resistance X X X by adjusting the variable resistance Y Y Y as shown in the figure. For the most precise measurement of X, X, X, the resistances P P P andQ Q Q:

Explanation

Our AI powered practice platform can help you achieve your doctor dream.

A Wheatstone bridge is used to determine the value of an 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 $Q$ :