Questions – Answers

Electrical and Electronics Engineering Interview Questions and Answers

Difference Between Voltage and EMF?

Fundamental Difference Between EMF and Voltage? What is a Voltage? The required amount of energy to move the unit charge from one point to another is known as Voltage. In…
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A Voltmeter, Ammeter & Cell are Connected in Series. Ammeter shows No Deflection. Why?

A Voltmeter, Ampere Meter and a Battery Cell are connected in Series. It is Observed that Ammeter Practically Shows No Deflection. Why? Due to the large resistance of the voltmeter,…
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Difference Between Real Ground and Virtual Ground

What is the Difference Between Real Ground and Virtual Ground? Real ground refers to a physical connection between the metallic body of a device to the earth or ground through…
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Why an Inductor acts as a Short Circuit in DC Supply?

What is the Role of Inductor in DC Circuit? In short, there is no frequency in DC supply i.e. frequency in DC = 0. We know that inductive reactance: XL…
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Difference Between a Transformer and an Induction Motor

An Induction Motor is fundamentally a Transformer – What is the Difference? The induction motor is fundamentally a transformer in which the stator is the primary and the rotor is…
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Why the Voltage in a Short Circuit is Zero and Current is High

Why the Reactance and Voltage under Fault Condition is Low and Current is High Theoretically and ideally, the Voltage and Reactance of a system (under fault condition such as short…
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Why Volume of the Conductor is Inversely Proportional to the Square of Voltage?

Prove that the Volume of a conductor is inversely proportional to the squire of Voltage (Vol = 1/V2). And what is the effect of this relation on Transmission and Distribution…
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In a Capacitive Circuit, Why the Current Increases When Frequency Increases?

Why the Current (I) Increases, When Frequency Increases in a Capacitive Circuit & Vice Versa? Another question from electrical and electronics engineering interviews question and answers series. Explain the statement that…
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In an Inductive Circuit, Why the Current Increases When Frequency Decreases?

Why the Current (I) Decreases, When Frequency Increases in an Inductive Circuit & vise versa? Another question from electrical and electronics engineering interviews question and answers series. Explain the statement that…
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Why Power Factor Decreases When Capacitive Reactance Increases or Capacitance Decreases?

In a Capacitive Circuit, Why the Power Factor (Cos θ) Decrease, When Capacitive Reactance (XC) Increases or Capacitance (C) Decreases? Another question from electrical and electronics engineering interviews question and answers…
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