Physics

The most common type of laser used in physics laboratories is the helium-neon laser. It consists of a discharge tube fitted with 15% neon gas and 85% helium gas.

The device which converts the electrical energy into mechanical energy is called a motor. The electric motor which is operated by Direct Current (DC) is called a DC motor.

The device which converts mechanical energy into the alternating current signal is called Alternating Current Generator.

Elastic modulus is the ratio of stress, below the proportional limit, to the equivalent stress. It is the measure of rigidity or stiffness of a substance (material).

A laser is a device used to produce an intense, monochromatic, and unidirectional coherent beam of light.

The phenomenon of change in the wavelength of an X-ray after collision with the electron is called Compton effect.

Pots were used to measure grain in various parts of the world in ancient times. Nonetheless, balances were likewise in use by Greeks and Romans. Beam balances were frequently utilized and are still in operation at many places.

The galvanometer is an electrical device that is used to detect the passage of current through a circuit. It is regarded as the historical name of moving coil, used to detect electric current.

AVO meter stands for A – ampere, V – volt, O – ohm meter. It is also known as a multimeter. Avometer or multimeter is a tester (instrument) that is used to measure electric current (both AC and DC)

The back motor effect (Counter-electromotive force) is the counter-torque that opposes the rotational motion of the coils in a generator when the generator is under load.