Q. In the circuit shown, if the 10 $\Omega$ resistance is replaced by 20$\ \Omega$ then what is the amount of current drawn from the battery?
A) 2.5A
B) 3A
C) 3.5A
D) 4A
Explanation
(d) The circuit shown is a balanced Wheatstone bridge. So, there is no current flowing through 10$\Omega$ resistance. Therefore, by replacing 10$\Omega$ resistance by 20$\Omega$ resistance, current in the circuit will be as such $ie.,$ 4A.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.