Questions
Two resistors are connected (i) in series (ii) in parallel. The equivalent resistance in the two cases are 9 ohm and 2 ohm respectively. Then the resistances of the component resistors are
detailed solution
Correct option is B
R1+R2 =9 and R1R2R1+R2 = 2 ⇒ R1R2=18 R1−R2 = R1+R2 2 − 4R1R2 = 81−72=3R1=6 Ω, R2=3 ΩTalk 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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