Engineering Physics Basic Concepts:
Following are the list of Engineering Physics Basic Concepts
Elasticity – Elasticity is the property by virtue of which a body regains its original condition when the deforming force is removed from it.
Stress – Stress is the internally developed force per unit area to oppose the deforming forces.
Strain – Strain is the ratio between change in dimension  and  original dimension of a body.
Hooke’s Law – Stress/Strain = Modulus of elasticity (within elastic limit)
Elastic Limit – Elastic limit is the maximum stress upto which the body regains its original condition when the deforming force or load is removed from it.
Yield Strength – Yield strength is the value of stress at the yield point at which extension of the wire increases rapidly without further increase in load while tensile load is applied on the wire.
Tensile Strength – Tensile strength is the maximum stress withstand by the material without having any fracture.
Constant Stress – Constant stress or dynamic stress acting on the body, increase of temperature, addition of more percentage of impurities and annealing  decrease  the  elasticity.
Young’s Modulus – Young’s modulus and bulk modulus will change the size without changing the shape of the material while shear modulus will change the shape without changing the size or volume.
Shaft – A shaft is a rotating  member  of a machine  and is used  to transmit torque (i.e. power from the source to load)
Neutral Surface – Neutral surface of the beam is defined as the surface in the bent beam at which there is no compression.
Bending Moment – Bending moment of the beam  is the  moment of  the  internal restoring  couple and equals to E Ig/R.
Cantilever – Cantilever is a beam fixed horizontally at one end and loaded at the other end.
Non-uniform Bending – Loading of the beam is only at a point (or) non uniformly
Uniform Bending – Loading of the beam is uniformly at all points of the beam.
I Shape Girders – I shape girders are used to save a good amount of beam material and to decrease the depression of the beam during loading.
Pirani Gauge – Pirani gauge is based on the principle that at low pressures, the thermal conductivity of a gas is directly proportional to the pressure of the gas.
Penning Gauge – Penning gauge is based on the principle that at low pressures the ionisation current produced by discharge is directly proportional to the pressure of the gas.
Rotary Oil Pump – Rotary oil pump is used to produce vacuum  about 10-3 torr.
Diffusion Pump – Diffusion pump is used to produce vacuum upto 10-7 torr. But it can work from 10-3 torr only. Based on the Bernoulli’s principle; i.e. diffusion of gases from high pressure to low pressure .