In the circuit shown, a meter bridge is in its balanced state. The meter bridge wire has a resistance 0.1, ohm/cm. The value of unknown

Q: In the circuit shown, a meter bridge is in its balanced state. The meter bridge wire has a resistance $0.1\, ohm/cm$. The value of unknown resistance $X$ and the current drawn from the battery of negligible resistance is

c (c) Resistance of the part $AC$ ${R_{AC}} = 0.1 \times 40 = 4\,\Omega $ and ${R_{CB}} = 0.1 \times 60 = 6\,\Omega $ In balanced condition $\frac{X}{6} = \frac{4}{6} \Rightarrow X = 4\,\Omega $ Equivalent resistance ${R_{eq}} = 5\,\Omega $ so current drawn from battery $i = \frac{5}{5} = 1\,A$.

SECTION - A [PHYSICS - MCQ]

GSEB - English Medium

In the circuit shown, a meter bridge is in its balanced state. The meter bridge wire has a resistance $0.1\, ohm/cm$. The value of unknown resistance $X$ and the current drawn from the battery of negligible resistance is

A$6 \,\Omega$, $5\, amp$
B$10 \,\Omega$, $0.1\, amp$
C$4 \,\Omega$, $1.0 \,amp$
D$12 \,\Omega$, $0.5\, amp$

Medium

STD 11 Science
NEET
STD 12 - 3. current electricity
Physics

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