Question

A very long straight wire carries a current I. At the instant when a charge +Q at point P has velocity v, as shown, the force on the charge is?
1) Opposite to OX
2) Along OX
3) Opposite to OY
4) Along OY​

Answer 1

Answer:

F

=q(

v

×

B

)=qvB(

i

^

×(−

k

^

))=qvB

j

^

⇒ force on the charge is along OY

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