Questions
The effective resistance between points P and Q of the electric circuit shown in fig. is
a
2Rr(R+r)
b
8R(R+r)(3R+r)
c
2r+4R
d
5R2+2r
detailed solution
Correct option is A
See fig The equivalent resistance is given by1Req=14R+12r+14r or Req=2RrR+rTalk 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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