Interview-Questions-with-answers

Center Tap: Center Tap is a point connected along the half way of transformer, inductor, resistor or potentiometer. It provides variable in the value. Center Tapped transformer: Mostly center tapped transformer are used to reduce low voltage supply. This happens when the demand is more than the supply voltage. If the transformer is overloaded then the output voltage reduces. This problem can be reduced by using Center tapped transformer where the number of turns can be changed by connecting at various point of windings. so the output voltage can be managed. Center tapped transfromer has the same working principle as normal transformer but the main difference is secondary winding is divided into two parts. Center tapped transformer Working Principle:  The working principle is same as normal transformer. If the alternating current is made to pass through the primary winding the flux will be produced in it, when the secondary winding is brought near to it, an induced e...

UPS:  UPS is a device which provides power to the device and regulates it for the short duration in the absence of main electrical power. It consists of battery which stores the energy needed during the presence of power. It involves rectifier, batteries, power inverter and static switch of several components. Rectifier: Rectifier is used for converting AC into DC as usual. Here the rectifier is used fro two main functions: Convert AC into DC to the supply  of filtered load or the supply inverter Convert AC into DC to charge the battery It is also used in charge controller purposes Battery: Battery  is used as a storage device. Rectifier converts AC from supply mains into DC. DC is stored in battery up to its charging capacity.It has two main functions: It converts electrical energy into chemical energy and stores it in the presence of power through rectifier  It converts chemical energy into electrical energy and delivers it to the load in...

1. What  is Linear Circuit?      A circuit in which the parameters remains constant with time and do not changes with voltage or current is called Linear Circuit. Linear Circuit always obeys Ohm's law 2. What is non-linear Circuit?      A circuit in which the parameters does not  remains constant with time and changes continuously  with voltage or current is called Linear Circuit. Linear Circuit does not obeys Ohm's law 3. What is Passive Element?      Element which is incapable of generating power but has the ability to store, dissipate or release the power is called passive elements. Resistors, capacitors, Diodes are example for passive elements 4. What is Active Element?     Element which is capable of generating power is called passive elements. Transistors, oscillators, integrated circuits are example for active elements 5.  What is Active Network?      Network w...