In a Wheatstone bridge (see figure), resistances P and Q are approximately equal. When R = 400 Ω, the bridge is balanced. On interchanging P and Q, the value of R for balance is 405 Ω. The value of X is close to

In a Wheatstone bridge (see figure), resistances P and Q are approxima

1.	In a Wheatstone bridge (see figure), resistances P and Q are approximately equal. When R = 400 Ω, the bridge is balanced. On interchanging P and Q, the value of R for balance is 405 Ω. The value of X is close to
A.	404.5 Ω
B.	401.5 Ω
C.	402.5 Ω
D.	403.5 Ω
Answer» D. 403.5 Ω

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In a Wheatstone bridge (see figure), resistances P and Q are approximately equal. When R = 400 Ω, the bridge is balanced. On interchanging P and Q, the value of R for balance is 405 Ω. The value of X is close to

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