Questions
The resistance across M and N in the given fig. is
a
r/ 2
b
r /3
c
6r
d
2r
detailed solution
Correct option is B
The resistance of each side of the triangle would be r / 2 as the two resistances are connected in parallel. The two sides are in series and hence their equivalent resistance would be (r / 2) + (r / 2) = r. This equivalent resistance is connected in parallel with third one. Hence1R=1r+1(r/2)=1r+2r=3r or R=r3Talk to our academic expert!
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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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