Current Electricity Charging Discharging Of Capacitors Question 698
Question: In the network shown below, the ring has zero resistance. The equivalent resistance between the point A and B is
Options:
A) 2R
B) 4R
C) 7R
D) 10R
Show Answer
Answer:
Correct Answer: A
Solution:
[a] As the ring has no resistance, the three resistances of 3R each are in parallel.
$ \Rightarrow \frac{1}{R’}=\frac{1}{3R}+\frac{1}{3R}+\frac{1}{3R}+=\frac{1}{R}\Rightarrow R’=R $
$ \
Therefore $ Between point A and B equivalent resistance $ =R+R=2R. $
BETA
