Q.
If the ammeter in the given circuit reads $2\ A,$ the resistance $R$ is
A) $1\ ohm$
B) $2\ ohm$
C) $3\ ohm$
D) $4\ ohm$
Explanation
(a) $i = \frac{V}{R} \Rightarrow 2 = \frac{6}{\frac{6 \times 3}{6 + 3} + R} = \frac{6}{2 + R} \Rightarrow R = 1\ \Omega$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.