Q. The lowest resistance which can be obtained by connecting 10 resistors each of 1/10 $ohm$ is
A) $1/250\ \Omega$
B) $1/200\ \Omega$
C) $1/100\ \Omega$
D) $1/10\ \Omega$
Explanation
(c) Lowest resistance will be in the case when all the resistors are connected in parallel
$\frac{1}{R} = \frac{1}{0.1} + \frac{1}{0.1}\ldots.$ 10 times
$\frac{1}{R} = 10 + 10\ldots\ldots$ 10 times
$\frac{1}{R} = 100\ i.e.\ R = \frac{1}{100}\Omega$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.