Find the maximum value of resolving power of a grating 3 cm wide having 5000 lines per cm, if the wavelength of light Used is 5890 A
A) 40000A
B) 45000A
C) 4500A
D) 5000A
Which of the following is not a postulate of Kinetic molecular theory of gases?
A) In gases there is a predominance of intermolecular energy
B) Collisions of gas molecules are elastic
C) All molecules have the same speed at diff temperatures
D) Do not exert the same pressure in all directions
How many fission take place per second in a 300 MW reactor, assuming each fission releases 200 MeV of energy?
A) 2.38 X 1018
B) 9.38 X 1018
C) 4.38 x 1018
D) 8.38 X 1018
During projectile motion, the horizontal component of velocity:
A) Changes with time
B) Becomes Zero
C) Remains constant
D) Increases with time
Soap film exhibits brilliant colours in sun light due to:
A) Dispersion of light
B) Interference of light
C) Diffraction of light
D) Scattering of light
The increase in the entropy means the increase in:
A) Disorder
B) Unavailability of energy
C) Randomness
D) All of these
The light of suitable frequency falling on metal surface ejects electrons, this phenomenon is called:
A) X-ray emission
B) Compton effect
C) Nuclear fission
D) Photoelectric effect
Which of the following series of H-spectrum lies in ultraviolet region
A) Lyman series
B) Balmer series
C) Paschen series
D) Bracket series
Choose the correct statement for a nuclear reactor:
A) Moderator slow down the neutron
B) Moderator bring the neutrons to rest
C) Moderator absorb the neutron
D) Moderator reflect the neutron
Average distance covered by a-particle in air before its ionizing power ceases is called its
A) Trajectory
B) Range
C) Firing level
D) Limit
