Jatinder Singh Solutions for Chapter: Practice Papers for Revision, Exercise 4: PRACTICE PAPER - 4

A cathode ray tube is used to emit cathode rays. What are cathode rays.

What is the principle of working of cathode ray tube ?

State the function of low tension and high tension batteries.

What is the function of: electron gun

How can you increase the brightness of spot on the screen.

Why should the glass tube need to be evacuated.

If electric and magnetic fields are applied simultaneously in the deflecting region, is it possible for electron beam to pass undeviated, explain.

A radioactive nucleus $\left({}_{\mathrm{Z}}{}^{\mathrm{A}}\mathrm{M}\right)$  emits three alpha particles and two beta particles. Find the ratio of number of neutrons to number of protons in the final nucleus.