B. Sc. 1st(sec-A)

The number of atoms per unit cell in simple, fcc and bcc unit cells are

• 1, 4, 2

• 1, 2, 4

• 2, 1, 4

• 2, 4, 1

Which of the following is an amorphous solid?

• Copper(Cu)

• Quartz glass (SiO₂)

• Silicon carbide (SiC)

• Sodium Chloride (NaCl)

What are the three states of matter?

• solid, volume, mass
• density, volume, mass
• solid, liquid, gas
• density, gas, volume

An element is made up of only one kind of _____.

• isotope
• plastic
• atom
• metal

The gravitational force between two masses is

• Repulsive

• Attractive

• Zero

• Infinity

The Lagrangian function is define by ____________

• L= F + V

• L= T - V

• L = T + V

• L = F - V

___________ constraints are independent of time.

• Holonomic

• Non-Holonomic

• Scleronomous

• Rheonomous

Generalized coordinates

• Depends on each other

• Independent on each other

• necessarily spherical coordinates

• May be Cartesian coordinate

The shortest distance between two points in a plane is ___________

• circular

• hyperbolic

• parabolic

• straight line

Metastable state is

• The ground state

• Any excited state

• an excited state with relatively larger life time

• an excited state with relatively smaller life time