Choose the correct circuit which can achieve the bridge balance. [NEET 2024]
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
For a diode to be active it must be forward biased. In options and , diode is reverse biased. Hence, options and cannot achieve bridge balance.
For option ,
Balance bridge condition is 
If 
, bridge can be balanced.
For option 
In this case, the resistance of 
branch can only decrease.
∴ This circuit cannot achieve balance condition.
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