A beam of electron is moving with constant velocity in a region having electric and magnetic fields of strength `20Vm^(-1)` and `0.5T` at right angles to the direction of motion of the electrons. What is the velocity of the electrons?

A beam of electrons is moving with constant velocity in a region having simultaneous perpendicular electric and magnetic fields of strength 20Vm^(-1) and 0.5 T, respectively at right angles to the direction of motion of the electrons. Then, the velocity of electrons must be

A beam of electrons is moving with constant velocity in a region having simultaneous perpendicular electric and magnetic fields of strength 20Vm^(-1) and 0.5 T, respectively at right angles to the direction of motion of the electrons. Then, to move undeflected the velocity of electrons must be (a) 8 m//s (b) 20 m//s (c) 40 m//s (d) (1)/(40)m//s

A beam of electrons is moving with uniform velocity in a region having transverse uniform electric and magnetic field of strength. 100 V/m and 0.1 T respectively at right angles to the direction of beam. The velocity of the electrons is

An electron moving with a kinetic energy of 1.5 xx 10^(3) eV enters in a region of uniform magnetic field of induction 4 xx 10^(-3) Wb//m^(2) at right angles to the direction of motion of the electron . The radius of circular path of the electron in the magnetic field is

An electron beam enters a magnetic field right angles to it as shown in the Figure. The direction of force acting on the electron beam will be :

An electron moving at the speed of 10^(7) m/s , enters a magnetic field of induction 0.1 T at right angle to the velocity of electron . The radius of circular path followed by the electron is

If an electron is going in the direction of magnetic field vecB with the velocity of vecv then the force on electron is

An electron beam is moving between two parallel plates having eletric field 1.125 xx 10^(-6) N//m . A magnetic field 3 xx 10^(-10) T is also applied so that beam of electrons do not deflect. The velocity of the electron is

In a certain region of space electric field E and magnetic field B are perpendicular ot each other and an electron enters region perpendicular to the direction of B and E both and moves undeflected, then velocity of electron is