[217] What is MOV, Metal Oxide Varistor, VDR, TVS in Urdu / Hindi Language 

in this video i discussed What is MOV, Metal-Oxide Varistor, VDR Voltage dependant Resistor, TVS Transient Voltage Suppressor. i discussed in urdu hindi language. Metal oxide varistors, also known as MOVs is a voltage dependant resistor. They are voltage dependent, its non-ohmic behavior provides transient suppression. MOVs are composed primarily of zinc oxide with small additions of other metal oxides. The structure of the body consists of a matrix of conductive zinc oxide grains separated by grain boundaries. These boundaries are responsible for blocking conduction at low voltages and are the source of the nonlinear electrical conduction at higher voltages. The use of a metallic oxide within their construction means that MOV’s are extremely effective in absorbing short term voltage transients and have higher energy handling capabilities. As with the normal varistor, the metal oxide varistor starts conduction at a specific voltage and stops conduction when the voltage falls below a threshold voltage. it is also known as transient voltage surge suppressor, it is used to protect any circuit from over voltage spikes

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