Questions
Six equal resistances are connected between points P, Q and R as shown in the figure. Then the net resistance will be maximum between
a
P and Q
b
Q and R
c
P and R
d
any two points
detailed solution
Correct option is A
Resistance between P and QRPQ = R || R3+R2 = R × 56RR = 56R= 511 RResistance between Q and R,RRQ = R2 || R+R3 = R2 × 4R3R2 + 4R3= 411 RResistance between P and R,RPR = R3 || R2+R = R3 × 3R2R3 + 3R2= 311 RHence it is clear that RPQ is maximum.Talk to our academic expert!
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A uniform wire of resistance 36 ohm is bent in the form of a circle as shown in fig The effective resistance across the points A and B is
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