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PhysicsJEE Main 21 Jan 2026, Shift 1·Q5·MCQ·Easy–moderate

Units and Measurements · Significant figures & errors

In an experiment the values of two spring constants were measured as k1=(10±0.2)k_1 = (10 \pm 0.2) N/m and k2=(20±0.3)k_2 = (20 \pm 0.3) N/m. If these springs are connected in parallel, then the percentage error in equivalent spring constant is:
  1. (1)2.67%
  2. (2)2.33%
  3. (3)1.33%
  4. (4)1.67%

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