Hi Student

When an object moves in a circle at a constant speed its velocity (which is a vector) is constantly changing. Its velocity is changing not because the magnitude of the velocity is changing but because its direction is. This constantly changing velocity means that the object is accelerating ( centripetal acceleration ).  For this acceleration to happen there must be a resultant force, this force is called the centripetal force .

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Hey there

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Check about JEE advanced

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Good luck

Hello Raju, Greetings!

According to Bohr's atomic theory, the energy of an electron in the stationary states around a nucleus of charge Ze is defined by quantum number n, and is given by, E (n) = - ( 2 π² m e⁴ Z²/n² h² ) in esu.

For hydrogen Z =1, and E( n ) = - ( 2 π² m e⁴/n² h² ).

The ionization energy is the energy to remove the electron from the bound state. In the present case the electron is in an excited state. So depending on the excited state the electron is in, the ionization energy will be 3.4ev or less.

Thank you.

Dear Venu, NTA majorly asks questions from NCERT. But you need to be prepared so as not to be surprised in the examination hall. Class notes is good but you will need few more books:

Physics Best Books:

NCERT Physics Class XI & Class XII

Concepts of Physics by H. C. Verma

Objective Physics By DC Pandey

Fundamentals of Physics by Halliday, Resnick and Walker

Fundamental Physics by Pradeep

Problems in General Physics by IE Irodov

Chemistry Best Books:

NCERT Chemistry textbooks for Class XI and XII

Physical Chemistry by OP Tandon

ABC of Chemistry for Classes 11 and 12 by Modern

Concise Inorganic Chemistry by JD Lee

Dinesh Chemistry Guide

Practise books by VK Jaiswal, MS Chauhan and N Awasthi

Biology Best Books:

NCERT Biology Class XI and Class XII textbooks

Biology Vol 1 and Vol 2 by Trueman

Objective Biology by Dinesh

Objective Botany by Ansari

Pradeep Guide on Biology

GR Bathla publications for Biology

Be confident and believe in Lord shiva