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objective questions class 10 science A piece of wire of resistance R is cut into five equal part

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Published on Jun 7, 2015

NCERT Solutions FOR CLASS 10 science Chapter 12 electricity,
Exercise Question 1
A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R', then the ratio R/R' is –

Resistance of a piece of wire is proportional to its length. A piece of wire has a resistance R. The wire is cut into five equal parts.
Therefore, resistance of each part =R/5
All the five parts are connected in parallel.
∴equivalent resistance (R') is given as

objective questions class 10 science A piece of wire of resistance R is cut into five equal part

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