B.sc Physics First Year Viva for Amu

Bsc viva VIVA FOR VALUE OF 'G' Q.1 what is g? A.1 acceleration due to gravity. Q.2 What is bar pendulum? A.2 A bar pendulum is a long iron rod...

VIVA FOR POTENTIOMETER
Q.1 WHAT IS POTENTIOMETER?
A.1
(1).
an instrument for measuring an electromotive force by balancing it against the potential difference produced by passing a known current through a known variable resistance.
(2).
a variable resistor with a third adjustable terminal. The potential at the third terminal can be adjusted to give any fraction of the potential across the ends of the resistor.

VIVA FOR MOMENT OF INERTIA
Q.1 WHAT IS MOMENT OF INERTIA?
A.1 A quantity expressing a body's tendency to resist angular acceleration, which is the sum of the products of the mass of each particle in the body with the square of its distance from the axis of rotation.

Q.2 LINEAR MOTION ?
A.2 Linear motion (also called rectilinear motion) is a motion along a straight line, and can therefore be described mathematically using only one spatial dimension.

Q.3 CIRCULAR MOTION?
A.3 In physics, circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. It can be uniform, with constant angular rate of rotation and constant speed, or non-uniform with a changing rate of rotation.

Q.4 RELATION BETWEEN LINEAR AND CIRCULAR MOTION?
A.4 LINER SPEED=RADIUS INTO ANGULAR SPEED
v=rω

Viva for elastic constant(y n k) part 3

Q.7 Diffrence between stress and pressure?
A.7 Pressure in the only 2D surfaces.But stress in 1D surface(linear surface),2D surface and 3D surface(cube).

Viva for elastic constant(y n k) part 2
Q.5 Bulk's modulus?
A.5 Defined as the ratio of hydrualic strees to the correspond hydrualic strain.
Q.6 Hooke's Law?
A.6 For small deformation stres is directed proportional to strain.
stres ¤ strain
stres = k. strain
where k is elasticity constant.

Viva for elastic costant(y n k)
Q.1 what is modulus of rigidity?
A.1 The ratio of shear stress to shear strain is called modulus of rigidity.
Q.2 What is Stress?
A.2 Force per unit area.
Q.3What is strain?
A.3 Strain is defined as extension per unit lenth.
Q.4 What is Young's modulus?
A.4 The ratio of tensile strees to longitudinal strain.

Viva for L C R part 2
Q.5 What is Inductance?
A.5 In electromagntism or electronics the property of conductor change in current flowing.
Q.6 OHM'S Law?
A.6 The potentional difference between the ends of a conductor current flowing in it.Provide tempreture does not change and physical state remain the same.
Potentinal difference is directly proportional to current.

VIVA FOR L-C-R CIRCUIT
Q.1 Defination of A.C current
A.1 The electric charge periodically in reverse direction called a.c
Q.2 Direct current?
A.2 The electric charge only one direction called D.C.
Q.3 What is Capacitance?
A.3 Capacitiy of store electric charge called capacitance.
Q.4 What is Capacitor?
A.4 Stored of electric charge called capacitior.

Part 2 value of g
Q.4 The value of g at pole and equator?
A.4 g=more than 9.8 at pole and more than 9.7 at equator.

Q.5 The relation between 'g' and 'G'.
A.5 g=GM/R square.

Viva for experiment first value of g.

Q.1 what is g?
A.1 acceleration due to gravity.

Q.2 What is bar pendulum?
A.2 A bar pendulum is a long iron rod, which use in the experiment of which one of the edges is fixed to move to and fro and friction less.

Q.3 What is simple pendulum.
A.3 A simple pendulum is one which can be considered to be a point mass suspended from a string or rod of negligible mass.