NEET TEST SERIES 155 PHYSICS

1. The radius of electron’s second stationary orbit in Bohr’s atom is R. The radius of 3rd orbit will be

(a) R/3    
(b) 2.25 R         
(c) 3 R              
(d) 9 R

2. A particle executes SHM of amplitude A. The distance from the mean position when its kinetic energy becomes equal to its potential energy is  

Deselect Answer

Deselect Answer

Choose the correct answer from the option given below:

(a) A-III, B-IV, C-I, D-II
(b) A-I, B-III,C -IV, D-II
(c) A-III,B-I,C-IV,D-II         
(d) A-II, B-I.C-IV, D-III

6. A prism of refractive index  and angle of prism A is placed in the position of minimum angle of deviation. If minimum angle of deviation is also A, then in terms of refractive, A = ________

(a) 7.5 MeV
(b) 9.0 MeV
(c) 8.0 MeV
(d) 8.5 MeV

8. Resistance of the wire is measured as 2Ω  and 3Ω  at 10°C and 30°C respectively. Temperature co-coefficient of resistance of the material of the wire is:

(a) 0.033⁰C^-1
(b) – 0.033⁰C^-1
(c) 0.011⁰C^-1
(d) 0.055⁰C^-1.

Deselect Answer

Deselect Answer

14. A glass prism of refractive index 1.5 is immersed in water (refractive index 4/3). A light beam incident normally on the face AB is totally reflected to reach on the face BC if
                     

15.  If the density of a small planet is the same as that of earth, while the radius of the planet is 0.2 times that of the earth, the gravitational acceleration on the surface of the planet is

(a) 0.2 g
(b) 0.4 g
(c) 2 g
(d) 4 g

16. The work function of a metallic substance is 5 eV. The threshold frequency is approximately

a) 1.6 × 10⁷ Hz
b) 8.86 × 10¹⁵ Hz
c) 9.68 × 10¹⁷ Hz
d) 1.2 × 10¹⁵ Hz