A negative test charge is moving near a long straight wire carrying a current.  The force acting on the test charge is parallel to the direction of the current.  The motion of the charge is :

  • Option 1)

     away from the wire

  • Option 2)

     towards the wire

  • Option 3)

     parallel to the wire along the current

  • Option 4)

     parallel to the wire opposite to the current

     

 

Answers (1)

As we learnt in

Fleming's left hand rule -

Direction of force on charged particle in magnetic field can also be found by fleming's left hand rule 

- wherein

 

 \vec{F}= q(\vec{\nu} \times \vec{B} )

According to fleming's left hand rule the direction of motion of charge is towards the wire.


Option 1)

 away from the wire

This is incorrect option.

Option 2)

 towards the wire

This is correct option.

Option 3)

 parallel to the wire along the current

This is incorrect option.

Option 4)

 parallel to the wire opposite to the current

 

This is incorrect option.

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