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NDA General Ability General Science 2025 NDA 2025 (Phase 1)

NDA General Ability Question (2025) — Solution

Question

If three resistors of 1 Ohm each connect in parallel to each other the resultant resistance is

Options

  1. A. 1 Ohm
  2. B. 1 3 Ohm
  3. C. 3 Ohm
  4. D. 9 Ohm

Answer

B. 1 3 Ohm

Step-by-step solution

For resistors connected in parallel, the equivalent resistance R_ eq is given by: 1 R_ eq = 1 R_1 + 1 R_2 + 1 R_3 Given R_1 = R_2 = R_3 = 1 , substituting the values: 1 R_ eq = 1 1 + 1 1 + 1 1 = 3 R_ eq = 1 3 Answer: 1 3 Ohm

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