Horsepower to kilowatts Convertor
Horsepower and kilowatt are two different units of measuring power. Watts is the SI unit of power. It is a well-defined and normally used unit.This is a simple tool to…
Voltage division rule | Potential divider circuit
Voltage division rule
Voltage division rule is one of the basic rules of circuit analysis. It is applicable to all series circuits and combination circuits. Series circuit always acts as a Voltage divider. In a series circuit, the same current flows through each resistance. Hence the voltage drops across each resistor are proportional to their ohmic value.
Series and Parallel circuits
Current flow in a circuit is determined by the impedance offered by the circuit components, which is in turn determined by the way circuit components are connected. Series connection and parallel connection are the two simplest ways of connecting a circuit.
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Ohm’s Law – Relationship between current and voltage
Ohm’s law is one of the basic principles of electricity. It relates the basic parameters of electricity, Current and voltage, to each other. Georg Ohm, after whom the law was named, conduct a few experiments on circuits containing different lengths of wires and found that the voltage applied and current are directly proportional. He derived a complex equation and published it along with his results in the book Die galvanische Kette, mathematisch bearbeitet in 1827.
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Contactor – Construction, Operation, Application and Selection
Contactor- Construction, Working Principle, Application
An electrical contactor is a switching device, widely used for the switching of motors, capacitors (for power factor correction) and lights. As the name indicates contactor are used to make or break contacts as like an ordinary on-off switch. The only difference is that the contactors have an electromagnet that holds the contacts when energized whereas switches do not have it.
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Difference between MPCB and MCCB
Motor Protection Circuit Breakers and Moulded Case Circuit Breaker and are devices used to open and close a circuit manually and interrupt the circuit automatically on the occurrence of faults. MPCBs and MCCBs are used to protect against overload and short circuits. Application of Motor Protection Circuit Breaker is entirely different from that of Moulded Case Circuit Breakers.
Difference between RCCB and RCBO
RCCBs and RCBO are residual current protection devices. Residual current protection is achieved by monitoring the flow of current in the line and neutral. In a healthy circuit, the current flow through the line will be equal to the return flow in the neutral. In the case of any abnormalities, this return flow may not be equal to the current flow in the line. Residual current devices sense such scenarios and interrupt the circuit.
What will happen if a DC voltage is applied to the transformer coil?
This is a very common question asked by those who are starting up with transformer science. You may come across the same question during interviews too. (more…)
Difference between MCCB and RCCB
Difference between MCCB and RCCB
MCCBs and RCCBs are circuit protection devices with two different application. When the former protect against overload and short circuit, the later protects against Residual currents and electric shock.