question_answer

For a positively charged particle moving in a x-y plane initially along the x-axis, there is a sudden change in its path due to the presence of electric and/or magnetic fields beyond P. The curved path is shown in the x-y plane and is found to be non- circular. Which one of the following combinations is possible?

A) \[\overset{\to }{\mathop{E}}\,=0;\overset{\to }{\mathop{B}}\,=b\hat{i}+c\hat{k}\]         

B) \[\overset{\to }{\mathop{E}}\,=a\hat{i};\overset{\to }{\mathop{B}}\,=c\hat{k}+a\hat{i}\]

C) \[\overset{\to }{\mathop{E}}\,=0;\overset{\to }{\mathop{B}}\,=c\hat{j}+b\hat{k}\]         

D) \[\overset{\to }{\mathop{E}}\,=a\hat{i};\overset{\to }{\mathop{B}}\,=c\hat{k}+b\hat{j}\]