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What is thermometry?

Thermometry The branch of heat relating to the measurement of the temperature of a body is called thermometry. The thermometer is an instrument used to measure the temperature of a body. The essential requisites of a thermometer are given as under:  1) Construction, 2) Calibration, and 3) Sensitiveness. For the construction of a thermometer, the proper choice of a substance, whose physical property varies uniformly with rising in temperature, is essential. 1) Construction The physical property of a substance plays an important role in the construction of a thermometer. In a mercury thermometer, the principle of expansion of mercury with rising temperature is used. The platinum resistance thermometer is based on the principle of the change in resistance with a change in temperature. The gas thermometer is based on the principle of change in volume or pressure with a change in temperature. 2) Calibration  When a thermometer is constructed, it should be properly calibrated. The standa

What is a generator? What is the function of a generator?

What is a generator? What is the function of a generator?

A generator is a power generating device with which kinetic energy is converted to electrical energy. The making of a generator is based on the principle of electromagnetic induction.

Most of the electricity we use in our homes is produced by generators. Inside a generator, coils of wire are rotated between the poles of a magnet. As the coils rotate, they cut through magnetic field lines generating current.


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