Some definitions of Physics II

Flywheel:
A flywheel is a mechanical device with a significant moment of inertia used as a storage device for rotational energy.

Moment of Inertia:
The tendency of a body to resist angular acceleration.

Rotational Energy:
The rotational energy or angular kinetic energy is the kinetic energy due to the rotation of an object and is part of its total kinetic energy.
 
Revolution:
A revolution (from the Latin revolutio, "a turn around") is a fundamental change in power or organizational structures that takes place in a relatively short period of time.

Vanier Constant:
The long scale which you see on the vernier calliper is the main scale. It gives you the main reading but for the accurate value we also use the small vernier scale built on the movable arm.first you put cylinder in the jaws of vernier calliper .you have to take reading from the main scale and then you have to choose the best coinciding line(main scale wihh vernier scale) and multiplying that line no. with vernier constant which is 0.01 and then adding this value to the main scale reading you get your accurate reading.

Angular Acceleration:
Angular acceleration is the rate of change of angular velocity over time. In SI units, it is measured in radians per second squared (rad/s2), and is usually denoted by the Greek letter alpha (α)

Refractive index:
The refractive index (or index of refraction) of a medium is a measure of how much the velocity of a wave is reduced inside that medium.

Angular velocity:
In physics, the angular velocity is a vector quantity (more precisely, a pseudovector) which specifies the angular speed of an object and the axis about which the object is rotating. The SI unit of angular velocity is radians per second

Focal distance: 
The distance from a lens to its focus.

Spiro meter: 
A measuring instrument for measuring the vital capacity of the lungs

Shunt:
In electronics, a shunt is a device which allows electric current to pass around another point in the circuit. The term is also widely used in photovoltaics to describe an unwanted short circuit between the front and back surface contacts of a solar cell, usually caused by water damage.

Galvanometer:
meter for detecting or comparing or measuring small electric currents

Ammeter:
An ammeter is a measuring instrument used to measure the electric current in a circuit. Electric currents are measured in amperes (A)

Commutator:
Switch for reversing the direction of an electric current.

DC power Supply:
A power unit that supplies direct current only. Examples: battery, transformer / rectifier / filter circuit, DC generator, and photovoltaic cell.

 
Deflection:
In physics deflection is the event where an object collides and bounces against a plane surface.

Converging lens:
Lens such that a beam of light passing through it is brought to a point or focus