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Question
A compass needle placed just above a wire in which electrons are moving towards west, will point
A compass needle placed just above a wire in which electrons are moving towards west, will point
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Solution
The correct option is B north
If electrons flow towards west, the current equivalently move towards east. Hence from right hand thumb rule, the magnetic field above the wire is towards south, which is same direction as that of earth's magnetic field.
Thus the compass continues to point towards north.
If electrons flow towards west, the current equivalently move towards east. Hence from right hand thumb rule, the magnetic field above the wire is towards south, which is same direction as that of earth's magnetic field.
Thus the compass continues to point towards north.
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