Questions
A technician has only two resistance coils. By using them singly, in series or in parallel, he is able to obtain the resistance of 3, 4, 12 and 16 . What are the resistances of the two coils?
detailed solution
Correct option is B
R will be maximum when the resistances are in series and minimum when the resistances are in parallel. So excluding the maximum and minimum values, we get the resistances of the two coils.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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