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In this research, a pv panel built from previous work will be used as a DC source for voltage cancellation inverter with help of PSPICE program. PV panel model defined as a hierarchical block in PSPICE library so, it called directly from PSPICE library as a special source and used it for most PV systems applications. A designed voltage cancellation inverter will be connected with this hierarchical block to simulate it in PSPICE. All results obtained from this simulation will be compared with experimental results. The voltage cancellation inverter will convert the dc input voltage to an approximate 130V 50Hz modified square signal.

In this paper we suggest a simple technique for validating the Goldstein–Wehner law for a stratified positive column of dc glow discharge while studying the properties of gas discharges in an undergraduate laboratory. To accomplish this a simple device with a pre-vacuum mechanical pump, dc source and gas pressure gauge is required. Experiments may be performed in nitrogen or even in air. First you need to photograph the discharge tube with striations at different gas pressure values and then you need to determine the thickness of the first striation on a computer monitor. (Some figures may appear in colour only in the online journal)

Our experiments show that for two or more pieces of a wire, of different lengths in general, combined in parallel and connected to a dc source, the current ratio evolves towards unity as the combination is cooled to the superconducting transition temperature Tc, and remains pinned at that value below it. This re-distribution of the total current towards equipartition without external fine tuning is a surprise. It can be physically understood in terms of a mechanism that involves the flux-flow resistance associated with the transport current in a wire of type-II superconducting material. It is the fact that the flux-flow resistance increases with current that drives the current division towards equipartition.

An ion migration-induced self-oscillation phenomenon observed in ionic polymer metal composites (IPMCs) is reported. These oscillations are generated from a purely static equilibrium configuration of IPMCs in loose contact with a stationary electrode, and in particular the anode of an imposed DC voltage source. Many interesting possibilities emerge, which are described in this paper. Of particular importance is the emergence of the possibility of creating tailor-made electric signals or pulse-width modulation-type signals from a DC source.