For what value of R the net resistance of the circuit will be 18 ohms

Text Solution
Verified by ExpertsThe correct answer is:
C
Here
is in parallel with 



hence it can be drawn as

Here
is parquet with
hence equivalent resistance is
Hence circuit reduces to








Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
The alloys constantan and managing are used to make standard resistance due to they have
When a potential difference is applied across the ends of a linear metallic conductor
The electric resistance of a certain wire of iron is R. If its length and radius are both doubled, …
A wire of diameter 0.02 meter contains 10 28 free electrons per cubic meter. For an electrical curr…
The following four wires are made of the same material and are at the same temperature. Which one o…
The colour sequence in a carbon resistor is red, brown, orange and silver. The resistance of the re…