Questions
Two uniform wires A and B are of the same metal and have equal masses. The radius of wire A is twice that of wire B . The total resistance of A and B when connected in parallel is
detailed solution
Correct option is A
RARB=rBrA4⇒RARB=124=116⇒RB=16RAWhen RA and RB are connected in parallel then equivalent resistance Req=RARBRA+RB=1617R4If RA=4.25Ω then Req=4Ω i.e. option (a) is correct.Talk to our academic expert!
Similar Questions
Four wires of equal length and of resistance 10 each are connected in the form of a square. The equivalent resistance between two opposite corners of the square is
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