A charged particle moves in a gravity-free space without change in velocity. Which of the following is/are possible?
(i) `E = 0, B = 0`
(ii) `E = 0, B != 0`
(iii) `E != 0, B = 0`
(iv) `E != 0, B != 0`

Four charges , all of the same magnitude , are placed at the four corners of a square . At the centre of the square , the potential is V and the field is E . By suitable choice of the signs of the four charges ,which of the following can be obtained? (i) V = 0 , E = 0 (ii) V = 0 , E != 0 (iii) V != 0 , E = 0 (iv) V != 0 , E != 0

A charged particle is moving with constant velocity in a region, then in which of the following possibility of E & B in that region, is this possible. (a) E=0, B=0 (b) E=0, Bne0 (c) Ene0, B=0 (d) Ene0, Bne0

For any event E ,which of the following is correct P(E)>=0 P(E) 0 P(E)<0

A charged particle moves in a gravity free space where an electric field of strength E and a magnetic field of induction B exist. State the following statements as True of False. a. If E pi 0 and B pi 0, velocity of the particle may remain constant. b. If E = 0 , the particle cannot trace a circular path. c. If E=0 , kinetic energy of the particle remains constant.

A charged particle moves in a gravity free space where an electric field of strength E and a magnetic field of induction B exist. State the following statements as True of False. a. If E pi 0 and B pi 0, velocity of the particle may remain constant. b. If E = 0 , the particle cannot trace a circular path. c. If E=0 , kinetic energy of the particle remains constant.

The unit of permittivity of free space (E_0) is :