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CBSE Class 10 Answered

a student obtains resistance 3,4,12and16 ohms using only two metallic resistance wires either separately or joined .What is the value of each of these wires?
Asked by | 10 May, 2011, 05:39: AM
answered-by-expert Expert Answer

The metallic wires have resistances 12 and 4 ohm.

Therefore, when they are connected in series, total resistance = 12 + 4 = 16 ohm.

When they are connected in parallel, total resistance = [(1/12) + (1/4)]1/2 = 3 ohm

And separately they can be used as wires of 4 and 12 ohm.

Answered by | 10 May, 2011, 09:24: AM

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