A) \[{{R}_{s}}+6{{R}_{a}}\]
B) \[\frac{1}{{{R}_{s}}}+\frac{1}{6{{R}_{a}}}\]
C) \[\frac{{{R}_{s}}{{R}_{a}}}{{{R}_{s}}+6{{R}_{a}}}\]
D) \[\frac{{{R}_{s}}{{R}_{a}}}{6{{R}_{s}}+{{R}_{a}}}\]
Correct Answer: D
Solution :
: The resistances are in parallel \[\therefore \] \[\frac{1}{R}=\frac{1}{{{R}_{s}}}+\frac{1}{{{R}_{a}}}+\frac{1}{{{R}_{a}}}+\frac{1}{{{R}_{a}}}+\frac{1}{{{R}_{a}}}+\frac{1}{{{R}_{a}}}+\frac{1}{{{R}_{a}}}\] Or \[\frac{1}{R}=\frac{{{R}_{a}}+6{{R}_{s}}}{{{R}_{s}}{{R}_{a}}}\] or \[R=\frac{{{R}_{s}}{{R}_{a}}}{6{{R}_{s}}+{{R}_{a}}}\]You need to login to perform this action.
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