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P-1 Effects of electric current — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10ScienceP-1 Effects of electric current5 Marks
Question
What do you mean by earthing?
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Answer

(i) Many electrical appliances have metallic body. If by chance insulation of the wire melts, the live wire may touch the metallic body of the appliance. If we touch this body with bare hands, we may receive severe electric shock.
(ii)To avoid such accidents, metal castings of all electrical appliances must be earthed. One end of the copper wire is connected to the metal case of the appliance and the other end is connected to the copper plate which is burried deep inside the earth.
(iii) This system of connecting the metal casting of an electrical appliance with a copper plate burried deep inside the earth is called as earthing.

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