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ICSE Class 10 Physics Question 42 of 136

Electro-magnetism — Question 5

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Question 5

A straight wire lying in a horizontal plane carries a current from north to south. (a) What will be the direction of magnetic field at a point just underneath it? (b) Name the law used to arrive at the answer in part (a).

Answer

(a) When a straight wire is lying in a horizontal plane and carrying current from north to south then the direction of magnetic field at a point just underneath is towards east.

(b) The law used is right hand thumb rule.