Questions – Answers

Electrical and Electronics Engineering Interview Questions and Answers

Is Lightning AC or DC ?

Is Lightning Alternating Current (AC) or Direct Current (DC)? Lightning is a transient impulse, meaning it’s neither purely AC nor DC, but rather a combination of both. In other words,…
Read More »

Why Can’t a Transformer Be Operated on DC Supply?

What Happens When the Primary of a Transformer is Connected to the DC Supply? A transformer is a device which step-up or step-down the level of AC current or voltage…
Read More »
What Happens When an AC Line Touches a DC Line?

What Happens When DC Equipment are Operated on AC Voltage and Vice Versa ? AC and DC Mixed Operated Devices There is no simple, one-word answer like ‘Yes’ or ‘No’…
Read More »

AC or DC – Which One is More Dangerous And Why ?

Which is More Dangerous – AC or DC? First of all, keep in mind that both AC and DC voltage and Current are dangerous and hazardous. Both are our friends…
Read More »
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…
Read More »
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,…
Read More »
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…
Read More »

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…
Read More »
Difference Between a Battery and a Capacitor

What is the Main Difference Between Battery and Capacitor? A Battery and a Capacitor is similar as both store and release the electrical energy and rated in Ah. But, there…
Read More »
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…
Read More »