An electron moves in circular path perpendicular to a constant magnetic field with a magnitude of 1.0 mT. if the angular momentum of the electron about the center of the circle is 8.1 `times` `10^-38` Js, then calculate v. (take `m_e` = 9 `times` `10^-31` kg).

An electron is moving on a circular path of radius r with speed v in a transverse magnetic field B. e/m for it will be

A particle having the same charge as of electron moves in a circular path of radius 0.5 cm under the influence of a magnetic field of 0.5 T. If an electric field of 100V/m makes it to move in a straight path, then the mass of the particle is ( Given charge of electron = 1.6 xx 10^(-19)C )

An electron is moving in a circular path under the influence fo a transerve magnetic field of 3.57xx10^(-2)T . If the value of e//m is 1.76xx10^(141) C//kg . The frequency of revolution of the electron is

The momentum of alpha -particles moving in a circular path of radius 10 cm in a perpendicular magnetic field of 0.05 tesla will be :

An electron, moving with a velocity of 5xx10^(7)ms^(-1) , enters in a magnetic field of 1 "Wb" m^(-1) at an angle of 30^(@0) . Calculate the force on the electron.

An electron (q = 1.6 × 10^(-19) C) is moving at right angles to a uniform magnetic field of 3.534 xx10^(-5) T The time taken by the electron to complete a circular orbit is

The radius of and alpha -particle moving in a circle in a constant magnetic field is half of the radius of and electron moving in circular path in the same field. The de Broglie wavelength of alpha -particle is n times that of the electron. Find n (an integer).

The speed of the electron in the hydrogen atom is approximately 2.2 xx 10^(6) m//s . What is the centripetal force acting on the electron ifthe radius of the circular orbit is 0.53 xx 10^(-10) m ?Mass of the electron is 9.1 xx 10^(-31) kg

An electron accelerated by a potential difference V= 3 volt first enters into a uniform electric field of a parallel plate capacitor whose plates extend over a length l= 6 cm in the direction of initial velocity. The electric field is normal to the direction of initial velocity and its strength varies with time as E= alpha t, where alpha= 3600 V m^-1 s^-1. Then the electron enters into a uniform magnetic field of induction B = pi xx 10^-9 T. Direction of magnetic field is same as that of the electric field. Calculate pitch of helical path traced by the electron in the magnetic field. (Mass of electron, m = 9 xx 10^-31 kg )

An electron has kinetic energy 2.8 xx 10^-23 J de-Broglie wavelength will be nearly. (m_e = 9.1 xx 10^-31 kg) .