Force on a moving charge, F=q(v×B)
Here, ∵q=−ve
⇒F=−q(v×B)
∴motion of−q is towards the wire.
JEE Main 2017 — Physics Electromagnetism
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:
Held on 9 Apr 2017 · Verified 6 Jul 2026.
Away from the wire
Towards the wire
Parallel to the wire along the current
Parallel to the wire opposite to the current
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