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Wheatstone Bridge

The equivalen...

Question

The equivalent resistance between the points x and y of the circuit. If each resistance is 25 ohm is

A

25

Ω

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B

100

Ω

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C

50

Ω

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D

12.5

Ω

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Solution

The correct option is B 25 $Ω$
Simplified circuit diagram is drawn
$A s \frac{R_{1}}{R_{2}} = \frac{R_{3}}{R_{4}}$

then

$V_{B C} = 0$
$R_{X Y} = \frac{50 \times 50}{2 \times 50}$
$R_{X Y} = 25 Ω$

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