Question 18 of 20

A particle having a mass of 10-2 kg carries a charge of 5×10-8 C. The particle is given an initial horizontal velocity of 105 ms-1 in the presence of electric field E and magnetic field B. To keep the particle moving in a horizontal direction, it is necessary that

(1) B should be perpendicular to the direction of velocity and E should be along the direction of velocity.

(2) Both B and E should be along the direction of velocity.

(3) Both B and E are mutually perpendicular and perpendicular to the direction of velocity.

(4) B should be along the direction of velocity and E should be perpendicular to the direction of velocity.

Which one of the following pairs of statements is possible ?

(a)   (1) and (3)                                       (b)    (3) and (4)

(c)   (2) and (3)                                        (d)   (2) and (4)