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).
Transformer on No Load – Circuit Diagram & Phasor Diagram Read More »
Consider the two winding single-phase transformer shown in figure (1).
Equivalent Circuit of Transformer – Circuit Diagram & Derivation Read More »
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.
What is Servomotor? Working, Diagram, Types (AC & DC) & Applications Read More »
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
Temperature Coefficient of Resistance – Definition, Formula, Derivation & Unit Read More »
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 »
Figure 1: Basic of Switch Mode Power supply (SMPS).
What is Switch Mode Power supply (SMPS)? Working, Block Diagram & Circuit Diagram Read More »
When the anode terminal of a diode is connected to the negative terminal of voltage source and cathode to the positive terminal then the diode is reverse biased as shown in Fig. 1 (a) and its symbolic representation in Fig. 1 (b).
What is Reverse Bias of PN Junction Diode? Read More »