Three particles having their charges in the ratio of $1 : 3 : 5$ produce the same spot on the screen in Thomson’s experiment. Their masses are in the ratio of
$5 : 3 : 1$
$3 : 1 : 5$
$1 : 3 : 5$
$5 : 1 : 3$
Kinetic energy of emitted cathode rays is dependent on
The charge on electron was discovered by
Which of the following will have the least value of $\frac{q}{m}$
What is charge on an electron ?
An electron (charge =$1.6 \times {10^{ - 19}}C$) is accelerated through a potential of $ 100,000 V$. The energy acquired by the electron is