Questions in Dual Nature of Radiation and Matter

Select	Question
	Cathode rays enter into a uniform magnetic field perpendicular to the direction of the field. In the magnetic field their path will be
	The specific charge of an electron is
	An electron is moving with constant velocity along $x - $axis. If a uniform electric field is applied along $y - $axis, then its path in the $x - y$ plane will be
	Cathode rays are similar to visible light rays in that
	Which one of the following devices makes use of the electrons to strike certain substances to produce fluorescence
	An oxide coated filament is useful in vacuum tubes because essentially
	Gases begin to conduct electricity at low pressure because
	A beam of electrons is moving with constant velocity in a region having electric and magnetic fields of strength $20\;V{m^{ - 1}}$and 0.5 T at right angles to the direction of motion of the electrons. What is the velocity of the electrons
	Kinetic energy of emitted cathode rays is dependent on
	The radius of the orbital of electron in the hydrogen atom 0.5 Å. The speed of the electron is $2 \times {10^6}m/s$. Then the current in the loop due to the motion of the electron is