Why is a BJT called a current controlled current source ? A BJT (Bipolar Junction Transistor) is called a current-controlled current source because its collector current (I_C) is primarily controlled by the base current (I_B). In an NPN transistor configuration, for example, an increase in the base current causes a proportional increase in the collector … Read more
The advantages of a Bipolar Junction Transistor (BJT) include high switching speed and efficiency in switching applications. BJTs are capable of operating at high frequencies, making them suitable for applications where rapid switching is required, such as in digital circuits and amplifiers. They also exhibit high current gain, allowing small base currents to control larger … Read more
To wire a Honeywell thermostat, first ensure the power to your HVAC system is turned off to prevent electrical shock. Remove the cover of the old thermostat and label the wires according to their terminal connections. Install the new Honeywell thermostat base on the wall, ensuring it is level. Connect the labeled wires to the … Read more
If a transformer is connected to a DC supply, it will not operate as intended. Transformers are designed to work with alternating current (AC) because they rely on the alternating magnetic fields induced by AC to transfer energy between the primary and secondary windings. When DC voltage is applied to the transformer, it generates a … Read more
A transformer is not typically used directly within a generator itself. Generators, whether they are AC or DC, function by converting mechanical energy into electrical energy through the principle of electromagnetic induction. In an AC generator (alternator), rotating coils (armature) within a magnetic field induce an alternating current (AC) in the windings. This alternating current … Read more
A lightning arrester is a device used to protect electrical power systems and equipment from damage caused by lightning strikes. It functions by diverting the high voltage surges generated by lightning to the ground, thus preventing them from passing through the electrical system. Lightning arresters contain components that can withstand and dissipate the high energy … Read more
An inverter and a generator are both devices used to provide electrical power, but they operate on different principles and have distinct characteristics. A generator typically runs on fossil fuels (such as gasoline, diesel, or propane) or alternative fuels (like natural gas or biodiesel) to produce mechanical energy. This mechanical energy is then converted into … Read more
Current transformer (CT) blasts or failures can occur due to various reasons, but one common cause is overcurrent conditions. When a CT is subjected to currents beyond its rated capacity for an extended period or experiences a sudden surge in current, it can lead to overheating of the windings and insulation breakdown. This overheating can … Read more
Encoders and decoders are used in various fields of electronics and communication to convert data from one form to another. Encoders convert information from a familiar format into a coded format, making data transmission and storage more efficient. Decoders perform the reverse function, translating coded data back into its original form. These devices are essential … Read more
How does a capacitor work in a fan ? Capacitors in fans, such as ceiling fans, serve several essential functions in their operation. One primary role of a capacitor in a fan is to provide the necessary phase shift between the current and voltage applied to the fan motor windings. This phase shift creates a … Read more