Question

explain snow rule in physics

Answer 1

south- north over west (snow)
when current flows South to north then needle reflects over west.

Answer 2

HELLO FRND
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Snow rule states that if the current is flowing in the electric circuit from the south to the north and a magnetic compass is kept, then the compass needle in the direction of wind, on the operating wire.

So,S from South, N from North, O from over, W from West- SNOW rule.
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THANK YOU
@SRK6