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A positively charge moving along the pos...

A positively charge moving along the positive x-direction with a speed traces a non-linear trajectory OA in the x-y plane after passing O as shown in the figure. The combination of electric (`vecE`) and magnetic field (`vecB`) fields that would lead to the trajectory OA is (a, b, c are non-zero positive constants),

A

`vecE=0 , vecB=ahatj+chatk`

B

`vecE=ahati, vecB=bhatj+chatk`

C

`vecE=0 , vecB=bhatj+chatk`

D

`vecE=ahati, vecB=bhati-chatk`

Text Solution

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The correct Answer is:
D
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