The ground state energy of hydrogen atom is -13.6 eV. When its electron is in the first excited state, its excitation energy is:

(a) 3.4 eV                                (b) 6.8 eV

(c) 10.2 eV                              (d) zero 

Concept Questions :-

Bohr's model of atom
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


 

In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of:

(a) excitation of electrons in the atoms 

(b) collision between the atoms of the gas 

(c) collisions between the charged particles emitted from the cathode and the atoms of the gas 

(d) collision between different electrons of the atoms of the gas 

Concept Questions :-

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The ratio of momenta of an electron and an α- particle which are accelerated from rest by a potential difference of 100 V is

1. 1                              2. 2memα
3. memα                      4. me2mα

Concept Questions :-

Various atomic model
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


When subjected to a transverse electric field, cathode rays move: 

(a) Down the potential gradient

(b) Up the potential gradient

(c) Along a hyperbolic path

(d) Along a circular path

Concept Questions :-

Various atomic model
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The fact that electric charges are integral multiples of the fundamental electronic charge was proved experimentally by 
(a) Planck                   (b) J.J. Thomson
(c) Einstein                 (d) Millikan

Concept Questions :-

Various atomic model
Please attempt this question first.

Difficulty Level:


The specific charge of an electron is 

(a) 1.6×10-19 coulomb

(b) 4.8×10-10 stat coulomb

(c) 1.76×1011 coulomb/kg

(d) 1.76×10-11  coulomb/kg

Concept Questions :-

Various atomic model
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The kinetic energy of an electron which is accelerated through a potential of 100 volts is

(a) 1.602×10-17 J            (b) 418.6 calories
(c) 1.16×104 K                 (d) 6.626×10-14 W- sec

Concept Questions :-

Various atomic model
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


An electron is accelerated through a potential difference of 200 volts. If e/m for the electron be 1.6×1011 coulomb/kg, the velocity acquired by the electron will be

(a) 8×106 m/s                            (b) 8×105 m/s
(c) 5.9×106 m/s                         (d) 5.9×105 m/s

Concept Questions :-

Various atomic model
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The ratio of specific charge of an α-particle to that of a proton is 
(a) 2 : 1                      (b) 1 : 1
(c) 1 : 2                      (d) 1 : 3

Concept Questions :-

Various atomic model
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


A charge of magnitude 3e and mass 2m is moving in an electric field E. The acceleration imparted to the charge is

(a) 2Ee / 3m                  (b) 3Ee / 2m 
(c) 2m / 3Ee                  (d) 3m / 2Ee

Concept Questions :-

Various atomic model
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level: