Discussion Forum



1)

 For the circuit shown in the figure, calculate the resistance between points A and B

137202145_m1.PNG


A) 0.5 R

B) R

C) 15 R

D) $\frac{6}{5}R$

Answer:

Option B

Explanation:

Key idea (i)  Equivalent resistance in series combination,

$R_{eq}=R_{1}+R_{2}$+.....

(ii)    Equivalent resistance in parallel combination,

$\frac{1}{R_{eq}}= \frac{1}{R_{1}}+\frac{1}{R_{2}}+\frac{1}{R_{3}}+......$

As , the circuit is ,

1472021838_g3.PNG

1472021431_g4.PNG

1472021665_g5.PNG

.1472021430_g6.PNG

Hence , the correct option is (b)