Questions
Two rods of same material and length have their electric resistance in ratio I : 2. When both rods are dipped in water, the correct statement will be
detailed solution
Correct option is A
R=ρ lA ⇒ R1R2 = A2A1ρ, L constant⇒ A2A1 = R2R1=2Now, when a body dipped in water, loss of weight=VσLg=ALσLgSo, Loss of weight1Loss of weight2 =A1A2=2; so A has more loss of weight.Talk to our academic expert!
Similar Questions
In an electrical cable there is a single wire of radius 9 mm of copper. Its resistance is 5Ω . The cable is replaced by 6 different insulated copper wires, the radius of each wire is 3 mm . Now the total resistance of the cable will be
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