MCQ
Current measured by the ammeter $(A)$ in the reported circuit when no current flows through $10\,\Omega$ resistance. will be________$A$
- ✓$10$
- B$9$
- C$11$
- D$8$
✓
Answer
Correct option: A.
$10$
a
Using the condition of a balanced wheat stone bridge,
Using the condition of a balanced wheat stone bridge,
$\Rightarrow \frac{ R }{3}=\frac{4}{6} \Rightarrow R =2\,\Omega$
So the effective resistance of the circuit is
$R _{\text {eq }}=\frac{6 \times 9}{6+9}=\frac{18}{5}\,\Omega$
$i=\frac{36}{R_{e q}}=10\,A$
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