A negative test charge is moving near a long straight wire carrying a current. The force acting on the test…

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:
  1. Away from the wire
  2. Towards the wire
  3. Parallel to the wire along the current
  4. Parallel to the wire opposite to the current

Solution

Force on a moving charge, F→=qv→×B→

Here, ∵q=-ve 

⇒F→=-qv→×B→

∴motion of-q is towards the wire.

Asked in: JEE Main 2017 (09 Apr Online)

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