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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:

Options

  1. AAway from the wire
  2. BTowards the wire
  3. CParallel to the wire along the current
  4. DParallel to the wire opposite to the current

Correct answer

B. Towards the wire

Step-by-step solution

Force on a moving charge, F → = q v → × B → Here, ∵ q = - v e   ⇒ F → = - q v → × B → ∴ motion of - q  is towards the wire.

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