A charged particle is kept at rest on a smooth horizontal surface in uniform magnetic field 'B' which is directed vertically downward as shown in the figure.

An observer is moving with constant velocity v towards right. Then with respect to the observer which of the following statements is/are correct :

Two particles are projected simultaneously from the same point, with the same speed, in the same vertical plane, and at different angles with the horizontal in a uniform gravitational field acting vertically downwards. A frame of reference is fixed to one particle. The position vector of the other particle , as observed from this frame, is vecr . Which of the following statement is correct?

Two particles are projected simultaneously from the same point, with the same speed, in the same vertical plane, and at different angles with the horizontal in a uniform gravitational field acting vertically downwards. A frame of reference is fixed to one particle. The position vector of the other particle , as observed from this frame, is vecr . Which of the following statement is correct?

To a charged particle which is moving with a constant initial velocity vecV, uniform magnetic field is applied in the direction of the velocity

A particle of charge +q and mass m moving under the influnce of a uniform electric field E hati and a uniform magnetic field Bhatk follows trajectory from P to Q as shown in figure. The velocities at P and Q vhati and -2vhatj respectively. Which of the following statement(s) is/are correct