Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Current Electricity/
Question 31681
JEE Physics · Hard

Current Electricity: Equivalent Resistance – Star Delta MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Equivalent Resistance – Star DeltaHardQuestion 31681

Question

In a delta circuit (each arm R_Δ), the equivalent star arm resistance R_Y is:
  1. A
    3R_Δ
  2. B
    R_Δ/3
    Correct
  3. C
    R_Δ
  4. D
    R_Δ²/3

Correct answer

R_Δ/3

Explanation

Star-delta transformation: R_Y = R_Δ/3 (for symmetric delta). Conversely, R_Δ = 3R_Y.

Review Current Electricity notesStart timed chapter practice