Question

what is meant by electric resistance of a conductor? what is SI unit of resistance? ​

Answer 1

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The electrical resistance of an electrical conductor is the opposition to the passage of an electric current through that conductor. The S.I. unit of electrical resistance is the ohm (Ω). The resistance (R) of an object is defined as the ratio of voltage across it (V) to current through it (I).

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Answer 2

Resources are free gifts of nature,but their over utilisation has led to many problems like

1) Resource depletion for satisfying the greed of few individuals.

2) Unequal resource distribution which created accumulation of resources in few hands. Due to which society is divided into rich and poor.

3) Global ecological crisis e.g. global warming,ozone layer depletion, environmental pollution and land degradation because of indiscriminate use of resources.