alleryThe earth wire in a house is recognised by insulation coloured:
AGrey
BGold
CCream
DGreen
Answer & Solution
Correct answer: D. Green
1. The earth wire is a safety measure for appliances with a metal body.
2. It has insulation of green colour and runs to a metal plate deep in the earth.
3. It gives leakage current a low-resistance path so the user is not shocked.
_Source: syllabus Science, Ch 13 'Magnetic Effects of Electric Current'_
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