Question : A moving neutron collides with a stationary α particle. The fraction of the kinetic energy lost by the neutron is:

Option 1: 1/4

Option 2: 1/16

Option 3: 9/25

Option 4: 16/25

Question : The radius of curvature of a charged particle's passage in a homogeneous magnetic field is proportional to:

Option 1: energy of particle

Option 2: charge of particle

Option 3: momentum of a particle

Option 4: strength of the field

Question : The functional unit of the kidney is

Option 1: neuron

Option 2: glomerulus

Option 3: nephron

Option 4: ureter

Question : Direct conversion of solar energy with the use of a photo voltaic cell results in the production of

Option 1: Optical energy

Option 2: Electrical energy

Option 3: Thermal energy

Option 4: Mechanial energy

Question : The area of a regular hexagon with side '$a$' is:

Option 1: $\frac{3\sqrt3}{4}a^2$ sq. unit

Option 2: $\frac{12}{2\sqrt3}a^2$ sq. unit

Option 3: $\frac{9}{2\sqrt3}a^2$ sq. unit

Option 4: $\frac{6}{2\sqrt3}a^2$ sq. unit