Current Electricity Charging Discharging Of Capacitors Question 742
Question: In a meter bridge, the balancing length from the left end (standard resistance of one ohm is in the right gap) is found to be 20 cm. The value of the unknown resistance is
Options:
A) $ 0.8\Omega $
B) $ 0.5\Omega $
C) $ 0.4\Omega $
D) $ 0.25\Omega $
Show Answer
Answer:
Correct Answer: D
Solution:
[d] $ \frac{P}{Q}=\frac{l}{( 100-l )} $
$ \text{or }P=\frac{l}{100-l}\times Q=\frac{20}{80}\times I=0.25\Omega . $
BETA
