Questions – Answers

Electrical and Electronics Engineering Interview Questions and Answers

Difference Between Active and Reactive Power – kW vs KVA

Main Difference Between Active and Reactive Power – W vs VA The main difference between active and reactive power is that Active Power is actual or real power which is…
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Why Do Electronic Circuits Use DC Current instead of AC?

Why Electronic Devices Use DC Supply instead of AC Supply ? One thing should be cleared that not all the electronic devices, components and circuits are using only DC supply,…
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Difference between Analog and Digital Multimeter

Main Differences between Digital and Analog Multimeter Both Digital Multimeter and Analog Multimeter (also know as multi-tester) are used to test and measure different electrical quantities such as Current in…
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Difference Between Capacitor and Supercapacitor

Difference Between Capacitor and Supercapacitor / Ultra-Capacitor Both Supercapacitor and conventional capacitors stores charge in the form of electrostatic field. They are passive components while supercapacitive a type of polar…
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Difference Between a Battery and a Capacitor

Main Differences between Batteries and Capacitors A Battery and a Capacitor is similar as both store and release the electrical energy and rated in Ah. But, there are some key…
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Difference between Circuit Breaker and Isolator / Disconnector

Main Differences between Isolator / Disconnector and Circuit Breaker Isolator and Disconnetor As the name suggests, An Isolator or Disconnector is an isolating or disconnecting switch which disconnects or isolate…
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Difference Between Relay and Circuit Breaker

Main Differences between Circuit Breaker and Relay A Relay is a switch used as sensing and controlling device which makes and closes the contacts electronically or electromechanically. Relay is also…
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Main Difference between Contactor and Starter

Difference between Contactor and Motor Starter The magnetic starter is very similar to the magnetic contactor in design and operation. Both have the feature of operating contacts when the coil…
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Main Difference between Fuse and Circuit Breaker

What is the Difference between Fuse and Circuit Breaker A fuse is a device, which is used to protect circuits from over current, overload and make sure the protection of the circuit. It…
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Difference Between MCB, MCCB, ELCB, RCD (RCCB) and RCBO Circuit Breakers

Main Difference Between MCB, MCCB, ELCB, RCCB (RCD or RCB) and RCBO Circuit Breakers Different types of circuit breakers are installed and used for safety purposes in both residential as well…
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