+2 Physics - Random One Mark Collection - Set 8

Questions from 61-70 are provided in this Physics set.

61) The fuel used in Kamini reactor is

a) ₉₂U²³⁸
b) ₉₂U²³³
c) ₉₂Pu²³⁹
d) low enriched uranium

62) One amu is equal to

a) 931 eV
b) 1·66 x 10^-27 kg
c) mass of oxygen atom
d) mass of carbon atom

63) The wavelength of D 1 and D 2 lines emitted by sodium vapour lamp is

a) 589·6 nm 589 nm
b) 589·3 nm. 589 nm
c) 589 nm. 589·6 nm
d) 589 nm. 589·3 nm

64) An electric dipole is placed in a uniform electric field with its axis parallel to the field. It experiences

a) neither a net force nor a torque
b) both a net force and a torque
c) only a torque
d) only a net force

65) When a ray of light Is incident on a glass surface at polarising angle of 57.5° the angle between the incident ray and the reflected ray is

a) 57·5°
b) 115°
c) 90°
d) 32·5°

66) The unit of henry can also be written as

a) VA/s
b) WA/b
c) all of these
d) Ohm second

67) In television. blanking pulse is applied to

a) horizontal plates
b) control grid
c) vertical plates
d) filament

68) An example for uniaxial crystal is

a) mica
b) topaz
c) selenite
d) tourmaline

69) High frequency waves follow

a) ionospheric propagation
b) ground wave propagation
c) the curvature of the earth
d) the line of sight direction

70) A dipole is placed in a uniform electric field with it's axis parallel to the field. It experiences

a) only a torque
b) both a net force and torque
c) neither a net force nor a torque
d) only a net force