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Question

An eleclron is travelling horizontallty towards east. A magnetic field in vertically downward (inside the plane of paper) direction exerts a force on the electron along

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 D South
Given: electron is moving towards east ,B= vertically downwards
Solution: Using Flemming left hand rule
  • Thumb=force
  • Fore finger= magnetic field
  • Middle finger =motion of electron
Direction of force will be in south
Hence the correct option is D

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