Subatomic Particles

Which of the following is never true for cathode rays?

Energy of an electron increases with increase in distance from the nucleus. Comment on the change in kinetic energy and potential energy.

Why is high voltage and low pressure maintained in the discharge tube?

Why was a gas at low pressure taken by Thomson while conducting the experiment? 

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Loss of electron from hydrogen atom results in nucleus of $~1.5\times {10}^{–3} \mathrm{pm}$ size.

Reason R: Proton $\left({\mathrm{H}}^{+}\right)$ always exists in combined form.

In the light of the above statements, choose the most appropriate answer from the options given below:

Choose the correct statements

The study of cathode rays (i.e. electronic discharge through gasses) shows that

Find the total negative or positive charge on a $2 \mathrm{g}$ silver coin. The atomic number and atomic mass of silver is $47$ and $107.9$ u respectively. Given Avogadro's number is $6.023\times {10}^{23}{ \mathrm{g}}^{-1}{ \mathrm{mol}}^{-1}$.

Two spheres A and B of gold (each of mass 1 kg.) are hung from two pans of a sensitive physical balance. If A is given 1 Faraday of positive charge and B is given 1 F of negative charge, then to balance the balance we have to put a weight of (1F = 96500 C)

A glass tumbler contains 1 billion amoeba and two sodium ions are there on the body of each amoeba. Find out the charge contained in the glass.

The mass of an electron is practically negligible as compared to the mass of a proton.

What is the charge on the sub-atomic particle 'proton'?

Why did Dalton's atomic theory fail?

Goldstein discovered the neutral sub-atomic particles.

The name of the scientist who discovered neutron is - 

The mass of a proton is $1840$ times that of an electron.

Mention any two properties of cathode rays.

Cathode rays do not depend upon the material of electrodes and the nature of the gas present in the cathode ray tube.

A high pressure and low voltage was applied in the cathode ray tube experiment.

What were the pressure and voltage conditions applied in the cathode ray tube experiment?