An electron is moving in the north direction. It experiences a force in the vertically upward direction. The magnetic field in that region is towards?
A
East
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B
West
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C
North
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D
South
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Solution
The correct option is A East
The electron is moving towards north so the conventional current will move towards south and the experienced force is verically upward and so when we apply feming's left hand rule, we will know that the magnetic field will be in the east direction.