What happens to the total resistance of a circuit when an additional resistor is added in parallel to an existing resist
For resistors in parallel, 1/R_{total = 1/R_1 + 1/R_2 . Adding another resistor increases the sum of reciprocals, reducing R_{total below the smallest individual resistance.
Ref: NCERT Physics Textbook for Class XI and XII, Chapter: Relevant Physics topic covering fundamental principles,