Current Electricity 2 Question 6
6. In a Wheatstone bridge (see figure), resistances and are approximately equal. When , the bridge is balanced. On interchanging and , the value of for balance is . The value of is close to
(2019 Main, 11 Jan I)
(a)
(b)
(c)
(d)
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Solution:
- For a balanced Wheatstone bridge,
In first case when
In second case,
Substituting the value of
The value of