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A very long straight wire carries a current I. At the instant when a charge + Q at point P has velocity →c , as shown, the force on the charge is
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- along oy
- opposite to oy
- along ox
- opposite to ox
Correct Option: A
The direction of →B is along (-̂k)
∴ The magnetic force
→F = Q(→v × →B) = Q(v̂i) × B(-̂k) = QvB̂j
⇒ →F is along OY.
