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Given below is a neat, labelled diagram to obtain balancing condition of Wheatstone bridge. Why is…
Given below is a neat, labelled diagram to obtain balancing condition of Wheatstone bridge.
(i)[1.0]
Why is the key ‘K’ pressed before the key K1?
- (a)There is no such requirement
- (b)To avoid a back emf in the closed loops
- (c)There is no current till the key ‘K’ is pressed
- (d)None of these
(ii)[1.0]
What is the relation between the potential at ‘B’ and ‘D’, when the bridge is balanced?
- (a)$V_B > V_D$
- (b)$V_B < V_D$
- (c)$V_B = V_D$
- (d)$V_B \ge V_D$
(iii)[1.0]
What is the galvanometer current when the bridge is balanced?
- (a)Ig flows from ‘B’ to ‘D’
- (b)Ig flows from ‘D to ‘B’
- (c)Ig has no significance in this case
- (d)$I_g = 0$
Answer
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From ISC 2022 Specimen Physics Paper 1, question 47.