1.

A 4Ω resistance wire is doubled by folding it, the new resistance is (A) 1Ω (B) 2Ω (C) 3Ω (D) None of these

Answer»

(A) 1Ω 

⇒ Req = 2 x 2 / 2 + 2

⇒ Req = 1Ω 



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