In a wheatstone bridge(see fig.), resistances P and Q are approximately equal. When R=400 , the bridge is equal. When R=400, the bridge is balanced. On inter-changing P and Q, the value of R, for balance, is 405 . The value of x is closed to: |
|||
(a) |
403.5 ohm |
(b) |
404.5 ohm |
(c) |
401.5 ohm |
(d) |
402.5 ohm |
In a wheatstone bridge(see fig.), resistances P and Q are approximately equal. When R=400 , the bridge is equal. When R=400, the bridge is balanced. On inter-changing P and Q, the value of R, for balance, is 405 . The value of x is closed to: |
|||
(a) |
403.5 ohm |
(b) |
404.5 ohm |
(c) |
401.5 ohm |
(d) |
402.5 ohm |