Dual Nature of ...

Electron volt is a unit of

Which of the following is not the property of a cathode ray?

In Bainbridge mass spectrograph a potential difference of 1000 V is applied between two plates distant 1 cm apart and magnetic field B =1 T. The velocity of undeflected positive ions in m/s from the velocity selector is

An electron is accelerated through a p.d. of 45.5 volt. The velocity acquired by it is (in ms^–1)

A cathode emits 1.8 × 10¹⁴ electrons per second, whenheated. When 400 V is applied to anode all the emitted electrons reach the anode. The charge on electron is 1.6 × 10^–19 C. The maximum anode current is

Order of q/m ratio of proton, α–particle and electron is

An electron initially at rest, is accelerated through a potential difference of 200 volt, so that it acquires a velocity 8.4 × 10⁶ m/s. The value of e/m of electron will be

An oil drop carrying a charge q has a mass m kg. It is falling freely in air with terminal speed v. The electric field required to make the drop more upwards with thesame speed is

Positive rays consists of

O⁺⁺,C⁺, He⁺⁺and H⁺ ions are projected on the photographic plate with same velocity in a mass spectrograph. Which one will strike farthest