${O^{ + + }},\;{C^ + },\;H{e^{ + + }}$ and ${H^ + }$ ions are projected on the photographic plate with same velocity in a mass spectrograph. Which one will strike farthest
${O^{ + + }}$
${C^ + }$
$H{e^{ + + }}$
$H_2^ + $
Which of the following law is used in the Millikan's method for the determination of charge
Positive rays consists of
Particle nature and wave nature of electromagnetic waves and electrons can be shown by
A beam of cathode rays is subjected to crossed electric $(E)$ and magnetic fields $(B).$ The fields are adjusted such that the beam is not deflected. The specific charge of the cathode rays is given by (where $V$ potential diffrence between kethod and anode)
In $1897$, J.J.Thomson invented which particle ?