Top 8 Questions and Answers on Electrical For Freshers With BTech Degree

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Why do we use a 3 phase supply ? why not 4 or something else ?

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taking a look in th4e voltage equation in DC motors V=Eb-IaRa

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Holding current is defined as the minimum anode current beyond SCR turns off. it is associated with turned off process

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Why thyristor is considered as Charge controlled device?

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Why are series motors never started on no-load?

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What is Automatic Voltage regulator(AVR)?

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These are generally protection relays used in transmission lines to check the line currents, which if exceeds triggers the circuit breaker.

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What is ferranti effect?

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Questions and Answers on Electrical For Freshers With BTech Degree

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Top 8 Questions and Answers on Electrical For Freshers With BTech Degree

Why do we use a 3 phase supply ? why not 4 or something else ?

3 phase power generation and distribution is more efficient than a 2 phase system which in turn is more efficient than a 1 phase system.

taking a look in th4e voltage equation in DC motors V=Eb-IaRa

Why is the starting current very high in a DC motor ?

Holding current is defined as the minimum anode current beyond SCR turns off. it is associated with turned off process

What is holding current ?

Why thyristor is considered as Charge controlled device?

SCR is considered a charge controlled device because while triggering the thyristor from forward blocking state to forward conduction state through the gate signal

Why are series motors never started on no-load?

Series motor on starting on no-load achieves dangerously high speeds which might damage the armature windings and the bearings due to which it is avoided.

What is Automatic Voltage regulator(AVR)?

AVR is short for Automatic Voltage Regulator which is an important part in Synchronous Generators, it controls the output voltage of generator by controlling its excitation current

These are generally protection relays used in transmission lines to check the line currents, which if exceeds triggers the circuit breaker.

Define IDMT relay?

What is ferranti effect?

During the no load or light loaded conditions in high voltage lines the receiving end voltage becomes more than the sending end voltage. This phenomenon is known as the ferranti effect.

Questions and Answers on Electrical For Freshers With BTech Degree