Questions
An electron is shot in steady electric and magnetic fields such that its velocity v, electric field E and magnetic field B are mutually perpendicular. The magnitude of E is 1volt/ cm and that of B is 2 tesla. Now it so happens that the Lorentz (magnetic) force cancels the electrostatic force on the electron, then the velocity of electron is
detailed solution
Correct option is A
v=EB=1 volt /cm2 tesla =100V/m2 tesla =50m/sTalk to our academic expert!
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A charged beam consisting of electrons and positrons enter into a region of uniform magnetic field B perpendicular to field, with a speed v. The maximum separation between an electron and a positron will be (mass of electron = mass of positron = m)
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