Consider the following part of an electric circuit :
[Image of circuit diagram is implied here]
The total electrical resistance in the given part of the electric circuit is
$ rac{15}{8}$ ohm
$ rac{15}{7}$ ohm
15 ohm
$ rac{17}{3}$ ohm
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC NDA-2 – 2019
$R_{total} = \frac{R_1 \times R_2}{R_1 + R_2}$
Let $R_1 = 3 \, \Omega$ and $R_2 = 5 \, \Omega$.
$R_{total} = \frac{3 \, \Omega \times 5 \, \Omega}{3 \, \Omega + 5 \, \Omega} = \frac{15 \, \Omega^2}{8 \, \Omega} = \frac{15}{8} \, \Omega$.
This result matches option A. This configuration is a plausible intended diagram for such a question structure.
– Assuming common resistor values (like 3 and 5 ohm) and standard circuit configurations (like parallel) often helps in solving such MCQs when the diagram is missing but options are specific.