Q.
A wire of resistance 18$\Omega$ is divided into three equal parts. These parts are connected in side of triangle, the equivalent resistance of any two corners of triangle will be
A) $18\Omega$
B) $9\Omega$
C) $6\Omega$
D) $4\Omega$
Explanation
(d) To find equivalent resistance across
BC, AB and AC is in series
$R^{'} = 6 + 6 = 12\Omega$
$12\ \Omega\ and\ 6\Omega\ $is in parallel
Total resistance,
$R = \frac{12 \times 6}{12 + 6}$
$R = \frac{72}{18} = 4\Omega$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.