Metallic conductors carry an electric current without any change in their physical and chemical state, except, perhaps, a rise in temperature. However, there are some liquids which can conduct an electric current, but the passage of current through them is always accompanied by a chemical change. Such liquids are known as electrolytes. Various chemical compounds […]
What is Electrolysis? Definition, Process, Diagram & Law Read More »
When the transformer is on load, the secondary winding is connected with load as in figure (1) and current I2 is flowing through load. Operation of Transformer On load Figure (1) shows a transformer with a load connected across the secondary winding. The load current I2 flowing through the secondary turns sets up its own
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When the transformer is on no-load, the secondary winding is opened as in figure (a) and current I2 is zero. In this condition, the primary winding draws a no-load current ‘I0‘ which has two components i.e., Magnetizing component (Iµ), and Working component (Iw).
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Consider the two winding single-phase transformer shown in figure (1).
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Servomotors are also known as “control motors”. They are generally used in feedback control systems as output actuators. There are two types of servomotors. They are, AC servomotors and D.C servomotors.
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Figure 1: Permanent Magnet Stepper Motor.
What is Permanent Magnet Stepper Motor? Working, Diagram & Construction Read More »
Figure 1. For pure metals, the resistance increases linearly with increase in temperature as shown in Fig. 1.8.2, and for a certain range of temperature (typically 0 to 100ºC) the rate of increase of resistance (slope of the line) remains constant. The resistance of metals reduces with reduction in temperature and it reduces to 0
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The batteries are available with some specific terminal voltages. e.g. 1.5V, 6 V, 12 V, 24 V, 48 V etc. If we want to have some terminal voltage other than these standard ones, then series or parallel combination of the batteries should be done. One more reason for connecting the batteries in series or parallel
Series and Parallel Connection of Batteries – Theory, Diagram & Formula Read More »
Thermistor or Thermal Resistor is a two terminal semiconductor device whose resistance is a temperature sensitive.
What is Thermistor? Working Principle, Symbol, Definition, Meaning & Diagram Read More »
The Open Circuit and Short Circuit Test on Transformer can be used to determine the efficiency and regulation of a transformer at any predetermined load for that we do not have to actually load the transformer. The parameters of the equivalent circuit of a transformer can be obtained by using the open circuit (O.C.) test
Open Circuit and Short Circuit Test on Transformer – Experimental Set-up & Procedure Read More »