If a wire of resistance R is cut into 4 equal parts and joined in parallel, the new resistance is:
AR/4
BR/16
CR
D16R
Answer & Solution
Correct answer: B. R/16
Each piece has resistance R/4 (since R ∝ length). Four such pieces in parallel: R_eq = (R/4)/4 = R/16. So total drops by factor 16.
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