Questions in Dual Nature of Radiation and Matter

Select	Question
	A charge of magnitude $3e$ and mass $2m$ is moving in an electric field $\overrightarrow E .$ The acceleration imparted to the charge is
	An electron initially at rest, is accelerated through a potential difference of 200 volt, so that it acquires a velocity $8.4 \times {10^6}m/s.$ The value of e/m of electron will be
	An $\alpha$ particle is accelerated through a p.d of ${10^6}$ volt then K.E. of particle will be
	Positive rays consists of
	${O^{ + + }},\;{C^ + },\;H{e^{ + + }}$ and ${H^ + }$ ions are projected on the photographic plate with same velocity in a mass spectrograph. Which one will strike farthest
	An electron beam is moving between two parallel plates having electric field $1.125 \times {10^{ - 6}}N/m$. A magnetic field $3 \times {10^{ - 10}}T$ is also applied so that beam of electrons do not deflect. The velocity of the electron is
	Positive rays was discovered by
	An electron is moving in electric field and magnetic field it will gain energy from
	If an electron oscillates at a frequency of 1 GHz it gives
	In an electron gun, the electrons are accelerated by the potential V. If e is the charge and m is the mass of an electron, then the maximum velocity of these electrons will be