Current Electricity Charging Discharging Of Capacitors Question 295
Question: Resistance in the two gaps of a meter bridge are 10 ohm and 30 ohm respectively. If the resistances are interchanged the balance point shifts by
[Orissa JEE 2003]
Options:
A) 33.3 cm
B) 66.67cm
C) 25 cm
D) 50 cm
Show Answer
Answer:
Correct Answer: D
Solution:
$ S=( \frac{100-l}{l} ).R $ Initially, $ 30=( \frac{100-l}{l} )\times 10\Rightarrow l=25cm $ Finally, $ 10=( \frac{100-l}{l} )\times 30\Rightarrow l=75cm $ So, shift = 50cm.
BETA
