MCQs on staright lines and circle

MCQ's

An electron moves staright inside a charged parallel plate capacitor of unifrom surface charge dencity sigma . The space between the plates is filled with constant magnetic field of induction vecB . The time of staright line motion of the electron in the capacitor is

In the adjoining figure, AOB is a staright line . Find the value of x. Hence, find angleAOC, angleCOD and angleBOD .

Which of the following option is correct for the object having a staright line motion represented by the following graph?