Basic Electrical Fundamentals: Circuit Types

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What is a circuit?

An open path through which magnetic flux can flow
A closed path for the flow of heat
A type of network having a closed path for the flow of electric current or magnetic flux (correct)
A type of network having an open path for the flow of electric current

What does an electric circuit consist of?

Connecting wires and loads such as a car engine
Energy source such as a water pump
Solar panels and wind turbines
Energy source such as a cell, connecting wires, and loads such as a lamp (correct)

What differentiates a DC circuit from an AC circuit?

DC circuits use direct current while AC circuits use alternating current (correct)
DC circuits use alternating current while AC circuits use direct current
DC circuits have loads such as lamp and fan while AC circuits have generators
DC circuits have a closed path for direct current while AC circuits have an open path for alternating current

What is the core material in a typical magnetic circuit made of?

Soft steel (B) Signup and view all the answers

How are the magnetic circuits classified?

Series magnetic circuit and parallel magnetic circuit (B) Signup and view all the answers

What is the main function of the winding in a magnetic circuit?

To produce magnetic flux in the core (A) Signup and view all the answers

What is a series magnetic circuit?

A circuit with only one path for magnetic flux (B) Signup and view all the answers

How is Fleming's Right Hand Rule used?

To determine the direction of current in a conductor (C) Signup and view all the answers

What is a parallel magnetic circuit?

A circuit with more than one path for magnetic flux (C) Signup and view all the answers

What is the purpose of a 3-phase generator?

To produce three voltages of the same magnitude and frequency (C) Signup and view all the answers

What is the relationship between the 3-phase windings in a generator?

They are displaced 120° apart from each other (B) Signup and view all the answers

In Fleming's Right Hand Rule, what does the middle finger represent?

Direction of induced EMF or current (A) Signup and view all the answers

What is a key advantage of a three-phase system over a single-phase system?

Delivers smoother power due to never falling to zero (B) Signup and view all the answers

Why are three-phase induction motors widely used in industries?

For their ruggedness, longer life, and higher torque (C) Signup and view all the answers

How does the weight of three-phase equipment compare to single-phase equipment of the same power rating?

Three-phase equipment weighs more (D) Signup and view all the answers

What determines the phase sequence in a three-phase system?

The order of maximum emf in coils of an alternator (A) Signup and view all the answers

Which phase sequence represents the natural colors of the phases in a three-phase system?

RYB (C) Signup and view all the answers

Why do three-phase systems have better voltage regulation compared to single-phase systems?

They provide a continuous supply of power (C) Signup and view all the answers